Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b3b236a0b8c5c9…

MALICIOUS

PDF

36.7 KB Authoring application: Mobipocket Creator
MD5: 9dc8f402d23acd76751e11be0d7d46d3 SHA-1: 649d25ff6e2438915b29a2cff37d8dd05fa9032a SHA-256: 69b3b236a0b8c5c9bf6bad0a5157d159aa93b74969fbbccd6be36365194fc14e
160 Risk Score

Malware Insights

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

The PDF contains a lure related to a house rent agreement and includes a mass of external links to other PDF files, indicating a link farm or redirection strategy. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, pointing to potential second-stage payloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://katletki.com/uploads/1/3/0/3/130379065/b9054.pdf
    • http://rumumer.lioele.ru/uploads/2020/01/29/8452074.pdf
    • http://mixerlost.weebly.com/uploads/1/3/0/5/130538842/somabugitad.pdf
    • http://pome.pleer.org/uploads/2020/01/27/gosevofufifulit.pdf
    • http://thevirtuallibrarian.com/uploads/1/3/0/4/130489038/057f942398f.pdf
    • http://mimundo.pl/uploads/1/3/0/6/130605384/2655708.pdf
    • http://reboundat.com/uploads/1/3/0/4/130476033/130476033.html#house+rent+agreement+format+chennai

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010d1.bin
ff290a32ec52b19861e3cde44a063ab59c35ccc10fe79533907b7508b69a9bcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1 8504 bytes

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