Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2e88095a1135b7…

MALICIOUS

PDF

37.6 KB Created: 2021-09-04 21:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 25acf5569f2a779acc97eb076833b0d3 SHA-1: 1c4e5efa2377e053909cf8836da69218031e9289 SHA-256: 6b2e88095a1135b7d95d9c6f406ad95ba9e9046a767dfb5608735c6a0fb9e875
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://catamma.ru/uplcv?utm_term=respironics+remstar+auto+service+manual PDF link annotation
    • http://africanhairbraidingsalon.com/userfiles/file/pakut.pdfIn PDF document text
    • http://pincodehub.in/userfiles/file/3375983043.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2bf05efd86---37166417189.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/zatadopuf.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210716211347.pdfIn PDF document text
    • https://begili.com/uploads/image/files/13572371490.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/veremuvujekitifodezulusi.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b1b1f0add---6776401073.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aca9585In PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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