Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ad9b3657a63ad2…

MALICIOUS

PDF

41.4 KB Authoring application: Serif PagePlus
MD5: cf086c7da92a7a3ea4c02c9f70aac2da SHA-1: 3ebb0edc490fc7538fb287c89de8bf16bab6c2a9 SHA-256: 32ad9b3657a63ad22e11cbff158710bdb005e8e313736e8c3c98c5e52160d2ae
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, and the heuristic firing for PDF_SEO_LINK_FARM confirms the link-farming behavior. No scripts were extracted from this sample.

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://thomasghenry.io/uploads/1/3/0/4/130476733/vobumomugewosi.pdf
    • http://thelunakit.com/uploads/1/3/0/3/130379676/7776394.pdf
    • http://mobileopsdetailing.com/uploads/1/3/0/2/130287424/wokugetid-beduzix.pdf
    • http://create218.org/uploads/1/3/0/6/130639827/2517031.pdf
    • http://mercedesschools.com/uploads/1/3/0/6/130604606/5128131.pdf
    • http://mrsmalindayoung.weebly.com/uploads/1/3/0/6/130604148/vatubawitam-wiginide-lerus.pdf
    • http://blueoxorganics.com/uploads/1/3/0/6/130621829/3554851.pdf
    • http://alyssup.com/uploads/1/3/0/4/130436318/4709858.pdf
    • http://noroydesign.com/uploads/1/3/0/4/130435743/xoxedoko.pdf
    • http://nationalfootballcheerleadersalumni.org/uploads/1/3/0/5/130590367/130590367.html#bitencourt+direito+penal+parte+especial+3+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001271.bin
1ed506cbb485ce4e208fecad9c2d951d31533ead798be7930eaedf1999ae6ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1271 10252 bytes

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