Malicious PDF — malware analysis report

Static analysis result for SHA-256 c081bdeae3b93805…

MALICIOUS

PDF

47.9 KB Authoring application: LibreOffice
MD5: e5e38242b4931666d52734d7ea6a0ed7 SHA-1: 7c8ce4ca0f818e88db7da0346637a913e0f0c389 SHA-256: c081bdeae3b938052898f11cd93381719586dc3d6c37db8934250abc27298107
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious content or further phishing pages.

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://piinttheskyflorida.org/uploads/1/3/0/6/130640179/f9d9713e12.pdf
    • http://minedearth.com/uploads/1/3/0/6/130621488/gasokipumorekodebo.pdf
    • http://xogulawuxa.jussom.xyz/uploads/2020/01/28/68a085ef3d4d473.pdf
    • http://stmargaretbiglake.com/uploads/1/3/0/4/130488265/rotuponujajeve.pdf
    • http://themathbutler.com/uploads/1/3/0/6/130620293/runuvijaxa-vuvisub-rozonadufixol.pdf
    • http://campmonty.org/uploads/1/3/0/5/130539046/kewujeledobujin.pdf
    • http://migratinglife.com/uploads/1/3/0/5/130588188/sugubedobiwovifok.pdf
    • http://tahocentr.ru/uploads/2020/01/28/tilafan.pdf
    • http://bhelandscaping.com/uploads/1/3/0/3/130313127/bde8cdbefc.pdf
    • http://mirrorletter844.weebly.com/uploads/1/3/0/2/130272925/fovegirufokixiv.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/5/130588732/130588732.html#sunken+city+warcraft+3+guide

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012aa.bin
6963d02d79bbe261ab33dd050f8f81a5a5972417b38405d7a88e8164f53469b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA 8548 bytes
font_01_sfnt_off000073e2.bin
0bcb8714eeee09f3a0b97cfa4268358194ea58a2d09b0ea1e98cdb863a7a445a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E2 16404 bytes

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