Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a23c399d75d8e5…

MALICIOUS

PDF

34.6 KB Authoring application: Solid Converter PDF
MD5: 10df6fc6aaa1dd8d76e7f68f511fa302 SHA-1: e003b867a83e53626d9184315f140688609155c3 SHA-256: 57a23c399d75d8e540e2d6b01bbae954f98061165acee8fade3b5f2a0468d49f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a phishing campaign designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://legatuscultureco.com/uploads/1/3/0/5/130538945/d7c11b7574bc0d.pdf
    • http://gearboxmarketing.com/uploads/1/3/0/6/130620679/nozuvafusel.pdf
    • http://ersteversiontanja.com/uploads/1/3/0/2/130271206/ee04e2bef5f.pdf
    • http://preethiajay.com/uploads/1/3/0/4/130476207/xazetitenokewe.pdf
    • http://www.old.sandiegoparanormalresearch.com/uploads/1/3/0/7/130738593/5940863.pdf
    • http://colbydesigned.com/uploads/1/3/0/6/130639481/f966fa78e4.pdf
    • http://feministhealthalliance.com/uploads/1/3/0/5/130590375/9363233.pdf
    • http://murielkneeshaw.net/uploads/1/3/0/5/130590336/gokapotadela.pdf
    • http://schgoc.com/uploads/1/3/0/7/130776141/6441683.pdf
    • http://aikosilkart.net/uploads/1/3/0/7/130776085/6315803.pdf
    • http://mail.bobbyas.com/uploads/1/3/0/7/130775107/tumobega_nujuxir.pdf
    • http://travelbysharon.voyagerwebsites.com/uploads/1/3/0/8/130813835/130813835.html#nescafe+dolce+gusto+piccolo+krups+review

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc2.bin
dee12cf58cb23bef8d6c125dd1aacdbeb94958e0ac75dec30525e6f5f40f035a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 8148 bytes

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