Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4543c38eecbddb…

MALICIOUS

PDF

67.6 KB Created: 2021-01-02 12:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59cf4b738f964922af3c0b2619cadc90 SHA-1: 35b6165e4f1b576ca7fbd5db06f66bf2f68626af SHA-256: 0f4543c38eecbddb0797d3e2b53a205029f02cd2acb763d9a0321d6bad641fff
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing malware. While no scripts were directly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9731

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://traffine.ru/aws?utm_term=android+auto+su+honda+jazz
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/kiwunonijemaven.pdf
    • https://cdn.sqhk.co/bepemuno/ihjcGgh/hockey_goal_sound_mp3.pdf
    • https://cdn.sqhk.co/tavikagisato/merSAib/survival_simulator_mod_apk_0._2._1.pdf
    • https://cdn.sqhk.co/fumazuri/dyhjrih/snipers_vs_thieves_wiki.pdf
    • https://cdn.sqhk.co/ninoporaleva/yXLK5ie/uncivilized_definition_easy.pdf
    • https://petavigavixate.weebly.com/uploads/1/3/4/4/134459614/8949381.pdf
    • https://cdn.sqhk.co/joduragenep/ngcibk2/zefegalubibabunupexixadat.pdf
    • https://cdn.sqhk.co/bojojiweg/S8hOyH0/football_games_penalty_shootout_world_cup_2010.pdf
    • https://cdn.sqhk.co/vopufepivipe/iFrghih/wordans_reviews_australia.pdf
    • https://bexoligimes.weebly.com/uploads/1/3/4/3/134314561/jijoxemumabeg_lupasevopapudab.pdf
    • https://cdn.sqhk.co/kisereta/gPjdibN/75210004209.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/68a2fd51-5b44-42d2-886f-1999767c9ee7/mabexuxenu.pdf
    • https://uploads.strikinglycdn.com/files/f5f7d325-389f-4d20-8453-c0050a570fc0/video_production_contract.pdf
    • https://uploads.strikinglycdn.com/files/7b9f067f-1ce7-4b4b-8db4-ee9394a51753/36107771553.pdf
    • https://uploads.strikinglycdn.com/files/f47cff49-d689-40f3-8377-68fd4aa38d50/fitusegekivizoxujivuwiban.pdf
    • https://uploads.strikinglycdn.com/files/b3b4e33b-2d3c-4edc-b54c-46c4109925f8/sisubimowunedowapexoxapo.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e310.bin
ddfff211080eece7abb6d7090d3d85dfb963731c073ad353c696c2fa77f8c1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 4996 bytes
font_01_sfnt_off0000f409.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 2092 bytes

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