Malicious PDF — malware analysis report

Static analysis result for SHA-256 3021994132953cd4…

MALICIOUS

PDF

182.4 KB Created: 2021-06-28 04:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1c0d4a0bd83ff0ca158ed7482bdc5a5a SHA-1: dea0447b21642466d56c288079faa19b93dc02ec SHA-256: 3021994132953cd42a799bda241bacd4a8fa4c319402915e5c60e9bbb6e04417
316 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document exhibits multiple social engineering lures, including requests for recovery secrets and prompts to install browser extensions or updates, indicative of phishing or credential harvesting attempts. The presence of numerous links to compromised WordPress sites and disposable hosting suggests a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit user trust and lead them to download further malicious content or divulge sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.ujepites.hu/userfiles/files/vagimibosugasokaxawewu.pdf In PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/h73qruj3bsi1g49kis31hm8p6j/kozomop.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/08872ce2678630189ce854f601b78077/zajigekejuwevilatonefikor.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd701ae879---20143968829.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bbad563bcf1---fomaxebatuzubegupuzedebi.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/80456113275.pdfIn PDF document text
    • https://bachson.net/upload/file/tukepamasegopebu.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/suwisaweluwaboke.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/xasetupo.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/7aa6228622d09248acac0445eb3a7660/sesilotupigudepisikusoso.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfc2d79568---xopopisuzenigivokujawir.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/8563b50db5a52694b67cf6c495551f5d/favuxujodijeruvetuwo.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/29884482744.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rb9cgir3smtgm8k261neh86c3q/mexusexalezovibiwol.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/xoximobuzonepefadidel.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/46219673889.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086e8dcce792---wutufudusolibiragarilaba.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/zedat.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/kijo91hvd0lvdlf948rh4ndsq1/89798543600.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608d41be5fed8---8930691414.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/68d35c003dd49b8eaedfa496d883dd04/gosunavivutegezirazitijo.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/6ghvrjle5ttqdk7s5ujtf9msah/xeniruzubadukodutokufovu.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/kilifusurizek.pdfIn PDF document text
    • http://smn69.com/clients/866038/File/wegedarezab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=windows+update+is+not+showing+in+servicesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B47 10992 bytes
SHA-256: 8ee53e826142bb3b7d717f35cff6840b8ebbaccb56ccf868aaf49e29fcd019ba
font_01_sfnt_off000284a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x284A4 17896 bytes
SHA-256: c1dbf777e3cd666c8c7f45bab1769852cf5906185d4dc763e428666ecd478109
font_02_sfnt_off0002b3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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