Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab81dcfcfeb4941…

MALICIOUS

PDF

35.1 KB Authoring application: LibreOffice Draw
MD5: 99dfcefc6335dab6fd8f0b4da20dc52e SHA-1: c9b1fdf0df3b2cd914bf4e93eeefbf486fed3982 SHA-256: eab81dcfcfeb4941e7b4aa454c60c00aeb2e420af8d3a9c23c29c4c25a6b6d1e
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically related to phishing traffic. The embedded URLs are likely used to redirect users to malicious content or further phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mrjrealtalk.com/uploads/1/3/0/7/130740617/veseliluwono_rilatubiboda_vaxerasefefejor.pdf
    • http://mightymustangband.com/uploads/1/3/0/6/130639304/782cdd28.pdf
    • https://bofutazi.weebly.com/uploads/1/3/0/5/130545800/eb60d7763c122f.pdf
    • http://designsbydorian.biz/uploads/1/3/0/6/130603772/b6c2f3562f87d8a.pdf
    • http://advance-it.net/uploads/1/3/0/2/130270834/130270834.html#easy+pumpkin+carving+patterns+free+printable

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001072.bin
24ae2e514c491ae9ba5d9a59902492cf0acfeb9bc4c954fb5b8a6ab1787e9c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1072 7968 bytes

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