Malicious PDF — malware analysis report

Static analysis result for SHA-256 6922141afd9ee338…

MALICIOUS

PDF

35.9 KB Authoring application: Adobe PDF Library 9.0
MD5: f52d88a595f3f839f24c86f621a2aa41 SHA-1: f1a624c89ba478d2b1456fc5f300a62896ca83a0 SHA-256: 6922141afd9ee338eedb7886977547623fb561e5f807542463cd1e0a806fb6e5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical finding for a large external PDF link farm. The embedded URLs point to numerous PDF files hosted on various domains, suggesting a campaign to manipulate search engine results or distribute further malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://retrofitmetalroofing.com/uploads/1/3/0/6/130639768/3668512.pdf
    • http://carolinekrouwels.com/uploads/1/3/0/9/130969957/0739f5.pdf
    • http://doodlepadart.com/uploads/1/3/0/8/130873994/wivurutitewuno_dezizotagoris.pdf
    • http://find-out.online/uploads/1/3/0/2/130287493/tebojuviba.pdf
    • http://kusumharchandrai.net/uploads/1/3/0/2/130274169/lorotigufad-dujoropofo-rujox.pdf
    • http://solarasterling.com/uploads/1/3/0/6/130603760/ziratozenifej.pdf
    • http://www.theforesthouse.net/uploads/1/3/0/6/130621979/jebuxataw_jemukefazu.pdf
    • http://insertbeakproductions.com/uploads/1/3/0/3/130313305/sozunun-xikevisav.pdf
    • http://www.rodrigodebrum.com/uploads/1/3/0/6/130604363/d4736268d.pdf
    • http://www.ayurvedicrhythms.com/uploads/1/3/0/7/130740572/3054718.pdf
    • http://www.ditchingthelifesuckers.com/uploads/1/3/0/6/130639054/1613624.pdf
    • http://2ndstorytextileworkshop.com.au/uploads/1/3/0/9/130969153/xulidenevorize.pdf
    • http://automobiligiammaria.com/uploads/1/3/0/8/130813849/bitulavele.pdf
    • http://927cu.salon225.com/uploads/1/3/0/7/130739533/130739533.html#exercises+present+simple+and+continuous+4+eso+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002749.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2749 2604 bytes
font_01_sfnt_off000032f8.bin
e42d1c1e6d431044d74a0a9da49eb25e1cc842bdc05945ec6b15c45160e4cf4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32F8 8160 bytes

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