Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9d8afd76d82bb0…

MALICIOUS

PDF

58.6 KB Created: 2020-11-29 14:31:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2374034d078e3aef2f29ff47dbd906f SHA-1: 143af84ba5beecc1918621a24e05148c0b69849a SHA-256: 8c9d8afd76d82bb0775c01cf3af04471165cc55b7dd6edbbea4e10c29314196e
212 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, including one pointing to a known malicious redirector. The presence of numerous external links suggests an attempt to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8918

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=psychedelic+video+effect+free
    • https://wibagubid.weebly.com/uploads/1/3/4/3/134373733/vafewuxusonobexema.pdf
    • https://cdn-cms.f-static.net/uploads/4420037/normal_5fa5997f24fde.pdf
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5faff1bb2b62c.pdf
    • https://cdn-cms.f-static.net/uploads/4416789/normal_5f9bb65ef0e33.pdf
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5f975e205176b.pdf
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5fb2cf27ac89e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7aae491d-d062-4ac9-8b37-95fcb986632d/47547740571.pdf
    • https://uploads.strikinglycdn.com/files/aa435ec4-6219-4207-abf0-db95a29abc41/webonuzapazekaxiluvozot.pdf
    • https://uploads.strikinglycdn.com/files/d2e8ee96-c02f-417e-aabc-52f0c7fa8af0/97135912214.pdf
    • https://uploads.strikinglycdn.com/files/809d98b7-b3ce-4e80-bd08-3992aed10e0b/wafojijafuzosarofu.pdf
    • https://uploads.strikinglycdn.com/files/0e064efd-1246-422c-bbea-dae2d3a8af78/vazevetebaka.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c043.bin
02616439a8852a93af2b909b7a4b088c89a3b21bfa783d4020df20d901cfb406		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC043 5184 bytes
font_01_sfnt_off0000d21a.bin
1fe3b12c5be4f14573f13894a03d614302dbac72423d89384c0e74065e5a2b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD21A 5060 bytes

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