Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bf9b1e831750f1…

MALICIOUS

PDF

42.1 KB Created: 2021-03-16 23:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ad82a933f5caab45d9ff8826daae4ef SHA-1: 63ef4b5ae2cc4531e509ac786320607555f62aca SHA-256: f6bf9b1e831750f117e72f0a1be0a2b424813f92930a1162328c51d8d3c34de5
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as a phishing lure due to its structure, containing a single image and a clickable link. The embedded link directs to 'https://yafferge.ru/award?keyword=accounting+cycle+problems+pdf', which is flagged as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure for users searching for accounting-related documents, aiming to redirect them to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7014

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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 42 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.
  • 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://yafferge.ru/award?keyword=accounting+cycle+problems+pdf
    • https://cdn.sqhk.co/felolavap/hhlhjja/xawudumadopixeguva.pdf
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5fe6b4d89a359.pdf
    • https://cdn.sqhk.co/dodirorip/Cwhgxgh/justin_herbert_scouting_report.pdf
    • https://pananufizusa.weebly.com/uploads/1/3/4/4/134445813/zojoxa_zijagegose_wejizek.pdf
    • https://rolobidixogiru.weebly.com/uploads/1/3/1/6/131637372/6384256.pdf
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/tepowajij.pdf
    • https://cdn.sqhk.co/wuvupalib/bUihigh/vusajonabimug.pdf
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5ff2f22b6aa87.pdf
    • https://zukafetovozod.weebly.com/uploads/1/3/1/6/131636890/2817697.pdf
    • http://lezozopose.iblogger.org/58647445697.pdf
    • https://soxodoma.weebly.com/uploads/1/3/4/6/134695887/7754427.pdf
    • https://fomiradoxep.weebly.com/uploads/1/3/4/5/134512134/7218698.pdf
    • https://cdn.sqhk.co/fotutubujuf/vheCwyR/65398884898.pdf
    • https://cdn.sqhk.co/begokaxawip/hhet01j/retro_game_world_apk_mod.pdf
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/b961ceaa69.pdf
    • https://jaxufeloz.weebly.com/uploads/1/3/4/0/134013101/da7d52bb32.pdf
    • https://fiwugoxatalaj.weebly.com/uploads/1/3/4/4/134498599/5323974.pdf
    • https://cdn-cms.f-static.net/uploads/4402944/normal_600d3591f26a7.pdf
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5fcf4fd3b9248.pdf
    • https://uploads.strikinglycdn.com/files/9c4739d9-2526-4176-b2fd-726f8e0750c7/pit_bike_track_melbourne.pdf
    • http://virixufagew.rf.gd/apa_itu_juz_dalam_al_quran.pdf
    • http://lekugonaj.rf.gd/bhimavaram_weather_report_today.pdf
    • http://jesogini.rf.gd/geometric_mean_formula.pdf
    • https://uploads.strikinglycdn.com/files/30fb0de6-6b5f-4748-beeb-274ffac9d58d/famosela.pdf
    • https://uploads.strikinglycdn.com/files/8252c645-9c09-4370-8874-9230cad9872b/geveko.pdf

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