Malicious PDF — malware analysis report

Static analysis result for SHA-256 79148acb9341a16b…

MALICIOUS

PDF

96.1 KB Authoring application: GIMP
MD5: ab3bc6390a9819ee4a54bc77c8ed2dd4 SHA-1: b5e5ff4c0cac86cf2e150685f829546838931701 SHA-256: 79148acb9341a16bf1556c53899cb8f963c68cdf966540e8e57dbead29195145
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malware. ClamAV detected this file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', indicating a phishing or malicious intent. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://koresources.weebly.com/uploads/1/3/0/6/130604414/foxipilebosefe-mabeliwugerok-sorol-damimew.pdf
    • http://thebeautifulwomanjb.com/uploads/1/3/0/6/130604169/bovabafij-limabigalogulox-risivijibi-ketevuwigimo.pdf
    • http://nycpublishingco.com/uploads/1/3/0/4/130483417/8218294.pdf
    • http://bridgeequityadvisors.com/uploads/1/3/0/7/130739185/bedutid.pdf
    • http://thehappygirlstore.com/uploads/1/3/0/6/130604105/130604105.html#soundarya+lahari+slokas+kannada
    • 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_off0000113a.bin
4c5949bfad8cbc82fb176a6d3aafcec6e2f463eefd1aa435b3c877ce8aa57b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A 8284 bytes
font_01_sfnt_off0001356c.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1356C 16204 bytes

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