Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a67ea84c134aee2…

MALICIOUS

PDF

36.2 KB Authoring application: Mobipocket Creator
MD5: 17b8bf3519fc30749125841ec5fa031f SHA-1: 815f8ffde102842dfd3e8e6a0e9803084965a343 SHA-256: 1a67ea84c134aee253481e3f17a84135e97523af122fb3d68d45796f6497c52c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many pointing to the same domain, indicating a link farm for SEO or phishing purposes. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to 'Elementos de los actos de comercio pdf' and a warning about an outdated Internet Explorer, likely a pretext to encourage clicking the embedded links, such as http://ofunatic.shop/uploads/1/3/0/5/130551486/65d011acc.pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ofunatic.shop/uploads/1/3/0/5/130551486/65d011acc.pdf
    • https://raxewakab.weebly.com/uploads/1/3/0/4/130490277/koniterovagajij-garube-wujurevunidopeg.pdf
    • http://mochisprite.com/uploads/1/3/0/6/130639148/piladilapifige.pdf
    • http://jemuguvaso.budpervym.ru/uploads/2020/01/28/9070eb43a6.pdf
    • http://caracarpenter.com/uploads/1/3/0/5/130590654/remopuxerorori.pdf
    • http://wekapop.teldiuxmexico.com/uploads/2020/01/28/pegoxowag_zuwufusiv_sapagegulivunak_jekenifaka.pdf
    • http://naturalraysllc.com/uploads/1/3/0/2/130287278/4039504.pdf
    • http://mrdi2020.com/uploads/1/3/0/4/130476332/130476332.html#elementos+de+los+actos+de+comercio+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011da.bin
670ee59c668d7f360fd2a11931699363760312d7e2b4771afcd594173d594278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA 8568 bytes

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