Malicious PDF — malware analysis report

Static analysis result for SHA-256 7958fe9d931af0f9…

MALICIOUS

PDF

36.2 KB Authoring application: Pdftk
MD5: 8aa6e41e40b72c9e9a2dbc275871cd7a SHA-1: 6d189d41e5ec37f43334a354919131e748a6236b SHA-256: 7958fe9d931af0f9ab273f11a22f1245ad08eeb7c082149cc8d67221958ee704
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The primary finding is a large number of embedded external links, suggesting a link farm or distribution mechanism. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to redirect users to malicious content or phishing sites.

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://dr-lawexperts.com/uploads/1/3/0/6/130605116/nipuwivilajimulaluj.pdf
    • http://golakeberryessa.com/uploads/1/3/0/3/130379474/7242267.pdf
    • http://boominworld.com/uploads/1/3/0/2/130273626/zibudibidediwa.pdf
    • http://christilsed.com/uploads/1/3/0/2/130270873/cb10c.pdf
    • http://jellytel.com/uploads/1/3/0/5/130588546/7f0f9a7c4600a.pdf
    • http://simplinow.tech/uploads/1/3/0/4/130483756/palowo.pdf
    • http://studiomaisonbejart.com/uploads/1/3/0/6/130620387/gerexafegu.pdf
    • http://mundotainos.com/uploads/1/3/0/5/130540507/zawopijusogakor-foleta-fenalip-nizapilalise.pdf
    • http://myentouragemusic.com/uploads/1/3/0/2/130270945/2035747.pdf
    • http://chicagoconstructionlawblog.com/uploads/1/3/0/6/130605248/2506197.pdf
    • http://meyersmpg.com/uploads/1/3/0/8/130874212/6347032.pdf
    • http://annabelchiarelli.org/uploads/1/3/0/7/130776805/3162214.pdf
    • http://speyroma.com/uploads/1/3/0/6/130621374/130621374.html#gta+vice+city+pc+missions

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033c8.bin
7b5122d51b7ae8a273b842429ccf3856578a5ed7667dcecd8d9db2eb47e07cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C8 8692 bytes

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