Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6738f0a688c326…

MALICIOUS

PDF

63.5 KB Created: 2020-11-13 00:06:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 233c842fef6180af9c828937eb29a51e SHA-1: 0011d7c087d1e4a5865b569ccde9da06f00b4369 SHA-256: ee6738f0a688c3263b5949324ee2c7944036f218002c7b7267a879c4d0b0645f
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. While many links point to benign PDFs, the primary URL 'https://traffine.ru/strik?utm_term=battlerite+2v2+tier+list' suggests a lure to a potentially malicious site. The ML classifier and ClamAV detection further indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8121

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=battlerite+2v2+tier+list
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8f42d9f1281.pdf
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f874e2d20303.pdf
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/94b984da07c.pdf
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/7045680.pdf
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5f9a3bfd29e1c.pdf
    • https://setekonireza.weebly.com/uploads/1/3/4/1/134131298/8737961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jasadavebaga/affixes_suffixes_and_prefixes.pdf
    • https://s3.amazonaws.com/mipeboro/kupefifosonozolinu.pdf
    • https://s3.amazonaws.com/rawesaragegugar/derolutom.pdf
    • https://s3.amazonaws.com/sisaxu/social_caste_system_in_brave_new_world.pdf
    • https://s3.amazonaws.com/lakadutof/rotmg_price_guide_most_recent.pdf
    • https://s3.amazonaws.com/jadudusujuje/psycho_pass_hue_chart.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f8.bin
1777105dc3a3b3636fad0a91cc44f38ec2faa8d315ce9d1fbccbcf02d1b93caa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F8 4920 bytes
font_01_sfnt_off0000dac9.bin
6e31d87dd1137735f65ab0c2cf25d16a87cce81a61456422d24df7048f070753		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 11172 bytes

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