Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c60ebe6f772ff1…

MALICIOUS

PDF

68.6 KB Created: 2020-12-30 11:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 62eb4754cf106524aa4db5bc4796a61e SHA-1: 38245595b576215e99a47cbfe638e5e1b8f2c22e SHA-256: 96c60ebe6f772ff1d253cb5b916a1f631b3bc48492699c2bc26dccf7efbe1e96
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of links to external PDFs, many hosted on disposable domains, suggesting a link farm or redirection infrastructure. One critical heuristic indicates a direct link to known malicious redirector infrastructure, specifically 'https://traffmen.ru/strik?utm_term=nbc+sports+live+gold', which is likely used to funnel victims to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9269

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
  • 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.
  • 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.
  • 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://traffmen.ru/strik?utm_term=nbc+sports+live+gold In PDF document text
    • https://fidinavaxevipew.weebly.com/uploads/1/3/4/8/134876378/81c107721c0.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/rugarod_mefowajerireza.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/cifghia/80770525239.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ihjCgfr/ios_screen_recorder_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/gdaiaij/nisimigin.pdfIn PDF document text
    • https://tasuvoni.weebly.com/uploads/1/3/4/6/134690764/3815248.pdfIn PDF document text
    • https://radamafusutu.weebly.com/uploads/1/3/4/6/134668344/3311909.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/3e44fed1f1b248f.pdfIn PDF document text
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/butux-rapiwoj-nirale.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/jihadjc/58390435081.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/hbtGCie/wufafajagu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09313b34-a4f0-4f11-88bd-72a372472cac/natasabevafona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ef3d5d7-ccaf-4b50-8486-1ccc6058063b/solanazukenonupasij.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 5264 bytes
SHA-256: 4dea8e4540c75184578590f9cc7a47449b5d0391947ba5174828094d3d35456b
font_01_sfnt_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 5200 bytes
SHA-256: 59b1416f8c0b4956c4874f0e4c4bf5f318a4f870f36548f749da8613d5f073db

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