Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1bd1423f61792f2…

MALICIOUS

PDF

81.3 KB Created: 2021-09-02 13:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 35dcc2678f84dca64f1fbb30076bb8b7 SHA-1: 8c574e673b01510e09b1ec84e6fc80d28612736b SHA-256: d1bd1423f61792f2bac1c9f8b969aec5bb72b7e7e17c41b7cf12c74a0907b340
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains embedded JavaScript and numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to solicit sensitive recovery information from the user. The embedded JavaScript likely facilitates the redirection to these malicious links or aids in the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 9

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://vitajeans.com/ckfinder/userfiles/files/68562045719.pdf In PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160968fd587a80---munusirisirufuvezafatov.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/55236549230.pdfIn PDF document text
    • http://seamacros.com/upload/file/70077881314.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16211990622769.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/rimuretef.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/nudoxavo.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/q4cbe40qr64gouhtoc6d7off2i/nowenexerom.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/bazobowetalisafujiza.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf55088de5---wasivesise.pdfIn PDF document text
    • https://mytopics.it/uploads/file/40156468106.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/84177728901.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/mixuxipofofuviwexedubuvi.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160da5595ef388---32175107935.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/96468734111.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/9tk96g506bka6ltdapjr257v82/50313693234.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/38085308493.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/timanaj.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/roxefekedizujizapufupiwow.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160afd51130e1b---30623773557.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/gevuteziku.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/pewivoganivo.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/xogunonukoxuxam.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/fajudimota.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c85336723f---jebuxazefagekumawugunut.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/49682301984.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=optical+communication+network+pdfPDF 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_off0000d9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D7 10916 bytes
SHA-256: 1dafd8b44c8783652b5f9ce9014a48a0fb72d92de21e3221e25cbaa06bb01efd
font_01_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 17088 bytes
SHA-256: c9c43958044393cfa04ca6df96d4c15f6fc6571c81830eb05f5e31d1d8a59a25
font_02_sfnt_off00011f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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