Malicious PDF — malware analysis report

Static analysis result for SHA-256 924ed703d7fbd578…

MALICIOUS

PDF

59.9 KB Authoring application: LibreOffice Draw
MD5: e8a3ac85856c0103981dbc47e845ff4b SHA-1: c5cf4fb81ded54981aec9c2394c3d2ad92d86854 SHA-256: 924ed703d7fbd5782b678f479a7aa0d7159f1819f607814a6c14f76efb9b6680
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The embedded URLs are likely used to distribute further malicious content or for SEO spamming. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mikekelley.us/uploads/1/3/0/6/130620781/simuk-lowanin.pdf
    • http://locary.net/uploads/1/3/0/5/130588773/4081989.pdf
    • http://rossjarratt.com/uploads/1/3/0/5/130544001/6cde0a8fded.pdf
    • http://espaces.cz/uploads/1/3/0/2/130270872/tamodem-saravetavu.pdf
    • http://renewair.org/uploads/1/3/0/5/130550768/8856906.pdf
    • http://amberbeuthien.com/uploads/1/3/0/4/130483477/9135329.pdf
    • http://okk.world/uploads/1/3/0/5/130550967/698039.pdf
    • http://worldbankawards.com/uploads/1/3/0/2/130289339/mimifelupukexodiw.pdf
    • http://saintalbansnyc.com/uploads/1/3/0/7/130739431/130739431.html#idrivesafely+defensive+driving+quiz+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e2.bin
b80a91de07c19c1943299dc4cacec8d8d7e848bd1bc9e3f226bf940431269de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2 8068 bytes

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