Malicious PDF — malware analysis report

Static analysis result for SHA-256 132580f09d013f3b…

MALICIOUS

PDF

45.5 KB Authoring application: pdf-parser
MD5: 313e9f1762cdca87901e79e169b07fbc SHA-1: 64790ae7699a6fde630768052f00c7d8d8d0e002 SHA-256: 132580f09d013f3b7bc0875699b4b4a1874db3d245e4ce6f4addd0f33eccb374
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', suggesting a phishing or traffic-generating purpose. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nascspirits.com/uploads/1/3/0/6/130621592/2e71800d.pdf
    • http://shampoochesbt.com/uploads/1/3/0/4/130488299/naxanawelipovuzujo.pdf
    • http://nlg-pros.com/uploads/1/3/0/5/130542852/repadonaput-sojoso-febanijaxodemog-zikav.pdf
    • http://postboxsucks.net/uploads/1/3/0/6/130621802/jokoromifun-boguse.pdf
    • http://cfthomas.com/uploads/1/3/0/4/130489437/130489437.html#easy+guitar+songs+no+barre+chords
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001284.bin
ea35933fb7d0a440bee3b1506633a565c778471058fdd422e94e2103ddda0ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1284 8948 bytes
font_01_sfnt_off00006c57.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C57 16036 bytes

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