Malicious PDF — malware analysis report

Static analysis result for SHA-256 72385f4586951451…

MALICIOUS

PDF

38.7 KB Created: 2021-04-02 00:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 15cfcfca7f1f82ffde504e11c53f32cb SHA-1: eef4f7b6c726d64fe0b6b8294992201306c928be SHA-256: 72385f4586951451069f13f92aa556fd3361c9af7d9380f2a2cd1d395cb5d36d
144 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.7332

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 38 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://xajibur.ru/award?keyword=merriam+webster+dictionary+pdf+free+download PDF link annotation
    • http://healingtunes.ru/is_gym_worth_itby7zl.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/bibokawekenodofomudtgqr.pdfIn PDF document text
    • http://azorocheat5.xyz/wepajolettgp9p.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/vicks_cool_mist_humidifier_filter.pdfIn PDF document text
    • http://coloradocustomelectric.com/bakafixinunonagurarkaxsh.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/zogamugagasisekeveda.pdfIn PDF document text
    • http://jedomagisuw.geteIn PDF document text
    • https://109d6476-c6f4-4eee-b84c-907698fb4207.filesusr.com/ugd/0d7ebf_854cb95fa0fa43068793e2470284bf05.pdf?index=trueIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_47b05d2e08824709acad27a249a91ca1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe05b48-2991-4513-a048-69c0a8fd10be/you_look_younger_than_ever_meaning_in_hindi.pdfIn PDF document text
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_aa68a51a71634c58a9190166dd6a5547.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/085afcfe-ada1-43dd-872e-2ce79deaaade/rumufe.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_5a589ffb1e814ea3b9b8d44194e95af5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c6f0e1-1a13-40e6-8698-9ffe7859fa5c/51492163655.pdfIn PDF document text

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