Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f701d799dc23e9…

MALICIOUS

PDF

80.0 KB Created: 2021-09-18 06:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e53207ac25fc1a958dfe7e6e5c53587 SHA-1: 4cf5dab72942d51d295482d3eb4db9e15223ea4d SHA-256: a3f701d799dc23e9d322174cbd2152ea1efbd017c1722044690209e6e19e3ed4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://queure.ru/uplcv?utm_term=watch+boruto+192 PDF link annotation
    • http://vevo.keresztessyoptika.hu/elemek/file/88617870051.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16131197f371a9---xovogaduxudufodejamur.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/jevirugub.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/16861835341.pdfIn PDF document text
    • https://izr.fr/files/lewinamamubaxemut.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a056dcd02---nidewonak.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/wotezawavanopilawaro.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/87806142441.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/jixumerunum.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/59569246027.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0df7426cd---vobobutukivaped.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/zafex.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/ditefomifatel.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140499fd7e44---89179489066.pdfPDF link annotation
    • https://ksuskalology.com/images/file/19061189504.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132404311d97---55482379775.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/46446503321.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/56939751276.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/80970991123.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/guduzelewawudu.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/repadopowapizivid.pdfIn PDF document text
    • https://ebus.myskoolapp.com/FCKeditor/FCKimgUpload/file/21285168743.pdfIn PDF document text
    • 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_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 17816 bytes
SHA-256: c663e2cd0511eedf501a971a4fac7d18153154f7cb04506ff037a4e136c5af2f
font_01_sfnt_off000102d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE7 10360 bytes
SHA-256: 9e05b73ed61ef66a0708c0af02b3772ed7fa933cd18d81738bb8a77bbeb4e9f0

Open this report in the interactive analyzer, or submit your own file for analysis.