Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad4c545d372a896…

MALICIOUS

PDF

37.0 KB Authoring application: Smallpdf Desktop
MD5: 2f270d0e24be5155a39206390d9e056c SHA-1: 6bf93c2d19b50776906b118f103593542524c2d7 SHA-256: fad4c545d372a896703c0a6ef3d1f88fe05ee208f112e8b18112e9b3010665b1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic identified a large number of external links, with the primary domain being migokozis.jasonbarun.com. This suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://migokozis.jasonbarun.com/uploads/2020/01/29/3666435.pdf
    • http://laxiw.cinemacritico.online/uploads/2020/01/28/zunudoxesovuza_jamadun.pdf
    • http://tribaninvestments.com/uploads/1/3/0/6/130621893/vuxop_riwebi_galaberamitusox_fawoseworu.pdf
    • http://nedunux.mariaflights.com/uploads/2020/01/27/0b392.pdf
    • http://salado.ru/uploads/2020/01/27/fatoxutanawanu.pdf
    • http://fugelu.gost-stroy.com/uploads/2020/01/28/4a6d66f237d1a7.pdf
    • http://sobironore.armpost.info/uploads/2020/01/28/655ce221c.pdf
    • http://housemarkt.ru/uploads/2020/01/27/rugojuzuditi_tekaruk_gazetexu.pdf
    • https://mareture.weebly.com/uploads/1/3/0/4/130483256/molureva.pdf
    • http://jaxa.infodope.club/uploads/2020/01/28/nujejoxawazipesat.pdf
    • http://actionzerousa.org/uploads/1/3/0/4/130436339/130436339.html#cranes+by+hwang+sunwon

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000142c.bin
5b8f4e55215235934dae121aa03f3ff9fa5794c9f76c789ea8d41802ca7b1721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142C 8352 bytes

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