Malicious PDF — malware analysis report

Static analysis result for SHA-256 5deacfb346a10dcf…

MALICIOUS

PDF

51.4 KB Authoring application: Karbon
MD5: ef04bebe79fb9263a68fa4a1373c41d0 SHA-1: 18b3b8df1f30faf3f993f0e4df4f803f01c079d5 SHA-256: 5deacfb346a10dcfddcf4a55c71ce84755b0e7503498ca8f4b9ded8ea2fcde2d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded URLs pointing to other PDF documents, a technique often used for SEO manipulation or to distribute malicious payloads. ClamAV detected this file as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious with high confidence. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for further malicious activity, possibly involving JavaScript execution within the PDF viewer.

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://crosshopefellowship.org/uploads/1/3/0/6/130640061/tokolore.pdf
    • http://spectacularvintageevents.com/uploads/1/3/0/5/130588426/podezolokod.pdf
    • http://mrskramlsclass.com/uploads/1/3/0/6/130639484/7708607.pdf
    • http://thefirstandtheworst.com/uploads/1/3/0/6/130605010/movixonu.pdf
    • http://totalnonsensebycashion.com/uploads/1/3/0/5/130588511/tilipamodalalagazax.pdf
    • http://smithscateringholbrook.com/uploads/1/3/0/6/130603690/monidowovile-natelozixu.pdf
    • http://siloambaptist-church.org/uploads/1/3/0/3/130313529/4013210.pdf
    • http://advance-it.net/uploads/1/3/0/7/130739185/130739185.html#physiotherapy+for+ankylosing+spondylitis+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000f9b.bin
4bbfc9d01f63d7f17f03dfe05fb8c071235cf39e6062937b392fccd4df9b486b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B 8532 bytes

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