Malicious PDF — malware analysis report

Static analysis result for SHA-256 be6fcb8c58eea0e1…

MALICIOUS

PDF

40.1 KB Authoring application: LibreOffice
MD5: 87a958088277e65dd8f15b3c3803ad14 SHA-1: 43644c5035a2772331a9e8d06f4aebd058e1b33a SHA-256: be6fcb8c58eea0e12291c6652d1b76b9af9264e01f0cf9af813f95e69b24b56c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded URLs pointing to other PDF files across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://purebarretexasstrong.com/uploads/1/3/0/7/130738997/2572958.pdf
    • http://shoreexcursionspuertoplata.com/uploads/1/3/0/5/130551890/92eb2c95df727.pdf
    • http://myeduzone.org/uploads/1/3/0/4/130490786/zobegusilemoxuzijud.pdf
    • http://evilgamers.com/uploads/1/3/0/2/130288320/fonojote.pdf
    • http://skidayz.co/uploads/1/3/0/5/130539238/zodonalumuguzot.pdf
    • http://2020blue.org/uploads/1/3/0/5/130590224/musuwonuxa_lawejexofim.pdf
    • http://mlphotoservice.com/uploads/1/3/0/3/130323485/sawerob_fanejube_kitepop_lejubob.pdf
    • http://ncscammers.com/uploads/1/3/0/7/130738542/wavifaw-duwot.pdf
    • http://dykewhistle.com/uploads/1/3/0/5/130551106/6479340.pdf
    • http://ukcitizenshipbyinvestment.com/uploads/1/3/0/3/130313022/weronal.pdf
    • http://americanlighting.org/uploads/1/3/0/7/130738641/130738641.html#50+kva+generator+to+amps
    • 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_off00001250.bin
f22caecba1be3b1c1b7c8dcb6200ba32b154ee82e986daa9e6cbc18a8d6c250d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1250 8096 bytes
font_01_sfnt_off000061a6.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 2604 bytes

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