Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce019dccfae3842…

MALICIOUS

PDF

68.6 KB Created: 2020-11-19 01:08:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25c71837b4374c441ee949aa4e31238f SHA-1: b0028532bd3989a61925650fe390f2c3898e45cd SHA-256: 9ce019dccfae3842b85a4b24376ebbc65c424968d965daca7e51210ecc447c36
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs with seemingly random filenames, indicative of a link farm or SEO spam tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

Heuristics 4

  • 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
  • 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://trafffi.ru/strik?utm_term=1999+yamaha+kodiak+400+4x4+repair+ma
    • https://gemegomuzek.weebly.com/uploads/1/3/4/3/134339500/sexexawel.pdf
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdf
    • https://totobulamu.weebly.com/uploads/1/3/4/3/134310137/0f2d4d33100f4ac.pdf
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/gevelogomupegu_batopitadem_ruwelepu_fikilumuzu.pdf
    • https://cdn-cms.f-static.net/uploads/4379613/normal_5f9c249b89958.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ebd58ba5-9b09-4040-810a-5b2137090a45/ritasikem.pdf
    • https://s3.amazonaws.com/wixatax/tofawabuz.pdf
    • https://s3.amazonaws.com/sojuravewi/maziwawam.pdf
    • https://uploads.strikinglycdn.com/files/9e8bf6cd-a628-4fc1-9ae2-4abd9f311688/29926270490.pdf
    • https://uploads.strikinglycdn.com/files/52af07df-a755-4640-992a-dcc27a41d3e6/frank_ocean_endless_album_download.pdf
    • https://uploads.strikinglycdn.com/files/d81f3e7d-e310-4138-8166-75475821d69b/estados_de_agregacion_de_la_materia_plasma.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d031.bin
a1a0874a3efa807b3dff2148ee3a50d89207895f4612dd8894e736e104664e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 5168 bytes
font_01_sfnt_off0000e1c9.bin
c0aa8efd90ba7a586655efaf06b3b5ef6015ab54ff078293d819dc0aeffa1eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 11160 bytes
font_02_sfnt_off000107d4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D4 4324 bytes

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