Malicious PDF — malware analysis report

Static analysis result for SHA-256 0467e8b6458d0a89…

MALICIOUS

PDF

51.7 KB Authoring application: PDFedit
MD5: 87be874b3ca446456c74769fd53d8e2b SHA-1: 868b5674f17ecd2edbfe2148722db6c21786de41 SHA-256: 0467e8b6458d0a89c70e1d45230b776b6064841363f24c670ca9190e6ea677fa
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or unwanted content distribution. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to redirect users.

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://izbudgeta.ru/uploads/2020/01/29/7181da.pdf
    • http://pittsburghyogaexpo.com/uploads/1/3/0/5/130546040/32d6858e246ea.pdf
    • http://winwithsuccess.com/uploads/1/3/0/3/130324136/d2171.pdf
    • http://kimbery-barrett.com/uploads/1/3/0/3/130379060/tupokapokutexujejepu.pdf
    • https://jepizalobatise.weebly.com/uploads/1/3/0/2/130272394/wetewugilapu.pdf
    • http://yourpublicistknows.com/uploads/1/3/0/4/130483263/831171.pdf
    • http://themoderndavinci.com/uploads/1/3/0/4/130477064/9853ff5e5edb888.pdf
    • http://gagix.cserv.org/uploads/2020/01/29/fb05bfdd91d1.pdf
    • http://jkeventfotgrafie.com/uploads/1/3/0/2/130288447/nevaluburudunodu.pdf
    • http://foothillsbiblefellowship.com/uploads/1/3/0/6/130604874/130604874.html#dcicn+study+guide

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001283.bin
9e317a67dc3577c2026ba421ea010e8c36b80db54636f87716890fdd4e674a33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1283 8360 bytes

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