Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bb160c6c2c067d…

MALICIOUS

PDF

72.7 KB Created: 2020-12-26 13:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 370415d3445bbc58e84ec0df13736d0e SHA-1: cc323ebfd2b63c47193e0df4a7eed76e1ff9c0f9 SHA-256: 17bb160c6c2c067d278a417313b24b764bf9689f408a749738b49efca43c8853
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The 'Virustotal download sample' text in the document body, combined with the numerous external links, indicates a likely attempt to direct users to malicious or deceptive content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8111

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://trafftec.ru/strik?utm_term=virustotal+download+sample
    • https://davokirik.weebly.com/uploads/1/3/0/7/130739121/3b96101f10c.pdf
    • https://jutijodofolumel.weebly.com/uploads/1/3/4/0/134012985/04fc4acbc645785.pdf
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/3444785.pdf
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/4446454.pdf
    • https://cdn-cms.f-static.net/uploads/4447270/normal_5fd67f4ce98f3.pdf
    • https://danivuvi.weebly.com/uploads/1/3/1/4/131407625/zewunoni-zitinupemu.pdf
    • https://s3.amazonaws.com/nolarifaforuxop/hindustan_ki_kasam_movie_song_bestwap.pdf
    • https://s3.amazonaws.com/fodose/60513133250.pdf
    • https://uploads.strikinglycdn.com/files/6b1d8bb5-9ba6-4d07-ae68-ba43c035a084/one_piece_kuma_vs_zoro.pdf
    • https://uploads.strikinglycdn.com/files/ef572150-e9e8-410b-b837-cebedc294305/megowo.pdf

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