Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcef32df6e07b0c3…

MALICIOUS

PDF

85.8 KB Created: 2021-06-01 15:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65af4ecb0ca18898009b881d2ac55f92 SHA-1: 08828b4be678e98d8aa63df2a72832f3c3fe4b82 SHA-256: bcef32df6e07b0c385789a1b9a373789e03bfe3037bb322ad4fa7ca9a2f9d488
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicative of a link farm or phishing operation. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95' further supports a malicious classification. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4774

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/pbw?utm_term=what+does+romeo+say+his+servant+will+bring+to+the+nurse+required+to+answer.+single+choice
    • https://cdn-cms.f-static.net/uploads/4416154/normal_600f041bbbb53.pdf
    • https://static.s123-cdn-static.com/uploads/4420250/normal_5ffa931de4945.pdf
    • https://xibupofuku.weebly.com/uploads/1/3/5/3/135306475/1223876.pdf
    • https://cdn-cms.f-static.net/uploads/4413017/normal_604dc00ceb496.pdf
    • https://vumopiwerelo.weebly.com/uploads/1/3/4/7/134730258/bavuwebefujelizukit.pdf
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/govamuneli-jovegonelu.pdf
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5feb40b22016d.pdf
    • https://cdn-cms.f-static.net/uploads/4460241/normal_60692e3c8c68d.pdf
    • https://static.s123-cdn-static-d.com/uploads/4392451/normal_60afffd71ab88.pdf
    • https://cdn-cms.f-static.net/uploads/4474988/normal_6046ecf09cdbe.pdf
    • https://cdn-cms.f-static.net/uploads/4377909/normal_601e821344a5a.pdf
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/mubofivo.pdf
    • https://wanukepaxe.weebly.com/uploads/1/3/4/4/134454717/2ff42e9887e30.pdf
    • https://jikiwifapa.weebly.com/uploads/1/3/4/3/134338998/bimopawefubazivus.pdf
    • https://fegowudabe.weebly.com/uploads/1/3/1/4/131438077/a0e2984bcae2a6e.pdf
    • https://fofosefekilom.weebly.com/uploads/1/3/0/8/130813764/mixisowob.pdf
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/xuloporadovulanagusa.pdf
    • http://pamotekegopa.pbworks.com/w/file/fetch/144439689/64179152009.pdf
    • http://jetipufagi.pbworks.com/f/gidevu.pdf
    • http://jopamedet.pbworks.com/w/file/fetch/144450297/lesson_plan_for_physics_class_10_cbse.pdf
    • https://uploads.strikinglycdn.com/files/a74be2b5-8749-4216-a76d-923c62b27788/the_bronze_horseman_poem.pdf
    • http://fevawigo.pbworks.com/f/plantronics_bluetooth_headset_pair_with_iphone.pdf
    • https://uploads.strikinglycdn.com/files/a6ac1702-ad84-40b2-9d10-5190b90e4b80/how_to_burst_a_boil_at_home.pdf
    • https://uploads.strikinglycdn.com/files/2c165640-f400-49a6-8127-9359ec0ace40/senonemurefikuraferen.pdf

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