Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec92c290207c308d…

MALICIOUS

PDF

39.4 KB Created: 2021-03-28 16:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 79344cc6045c336301cc397d131c068e SHA-1: 8e3e26c3abd9ada0558539cf68e8587e99998908 SHA-256: ec92c290207c308d6f83c11f5e286b7423691c1ef50d83641f5492e9dc37cad3
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to disposable hosting services, suggesting a link farm for SEO poisoning or to redirect users to malicious sites. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8398

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image-only PDF lure links to a brand-impersonating host high PDF_IMAGE_LURE_BRAND_HOST_LINK
    PDF is image-heavy with little real text and its clickable action targets a host carrying the brand name 'fedex' as a domain label / subdomain segment on a registered domain that is not that brand's own and is not known-good (e.g. 'udai.walmartnewjersey.com', 'paypal-secure.net'). Unlike the homoglyph-typosquat rule, the brand here is spelled correctly but glued onto an unrelated domain — the canonical brand-impersonation phishing / scam carrier shape behind a screenshot-like lure page.
  • 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 39 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://jottigo.ru/award?keyword=classification+of+anopheles+mosquito+pdf PDF link annotation
    • https://jopuxokoxi.weebly.com/uploads/1/3/4/3/134350500/loridaxu.pdfIn PDF document text
    • http://fedexonep.mypressonline.com/l_adjectif_qualificatif_pithte_et_attribut_exercices_corrigs.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/sejidedojagil.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/Jgh9giO/56920922837.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/jiiigiL/sedifedu.pdfIn PDF document text
    • https://budemarapi.weebly.com/uploads/1/3/1/3/131381681/78a025b13ebd4c.pdfIn PDF document text
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/490133308250.pdfIn PDF document text
    • https://cdn.sqhk.co/duzimisese/hGZ4hcA/pofarefububexuz.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/juramopeba.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/hgwxhe4/wemovirobawisikotusosibun.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/45423087347.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/watojow.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/iRkKhjv/34563261551.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/jgfjdXE/godotatanojurenoru.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hcvjhhg/20482901533.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/gOii2hb/vive_sync_avatar_creator.pdfIn PDF document text
    • https://jiwanozote.weebly.com/uploads/1/3/4/3/134354006/d66579d665.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/hiiw4ia/21027655891.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/the_power_of_a_praying_wife_book_of_prayers.pdfIn PDF document text

Related samples 8

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