Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c263ceaee1900f7…

MALICIOUS

PDF

39.1 KB Authoring application: LibreOffice
MD5: e1ff153ee54be07505f835557c10ebda SHA-1: 13181e7704a5990c3f688d3edd59e4fef3d6a464 SHA-256: 3c263ceaee1900f790f50379e77cf322a1de70922801d37da8b50456c0784539
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic specifically identified a large number of external links, with the first being http://crinem.com/uploads/1/3/0/4/130476320/8d6b7cfe0a110a9.pdf. This suggests the document is designed to lure users to external sites, likely for phishing or malware delivery.

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://crinem.com/uploads/1/3/0/4/130476320/8d6b7cfe0a110a9.pdf
    • http://mollybalesfranco.com/uploads/1/3/0/6/130639669/vugivexuwo.pdf
    • http://sfw2018.com/uploads/1/3/0/2/130287898/15d2e.pdf
    • http://oraclereadings.com/uploads/1/3/0/6/130604598/c0933de3e5dc4.pdf
    • http://beavercrossministries.com/uploads/1/3/0/6/130620751/4218991.pdf
    • http://serenitystitchesny.com/uploads/1/3/0/5/130543057/d6e36.pdf
    • http://mywrappingco.com/uploads/1/3/0/6/130621176/1888218.pdf
    • http://bringyourinnerartistout.com/uploads/1/3/0/5/130588547/nudedawolilawugaduna.pdf
    • http://riversidecountyhistory.org/uploads/1/3/0/5/130539034/130539034.html#blender+2.8+export+fbx+with+animation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001194.bin
50c7a349cc31eed234f6e70c777986918fa7a68387909fc12d8b927f94e9da0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1194 8196 bytes

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