Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd3034d9bed9898…

MALICIOUS

PDF

36.4 KB Authoring application: Karbon
MD5: 6bdcdb5e46c1e9ae9535c7598eeaf8c2 SHA-1: bb0e9505d6d99cb666989ac302b5684d06b58ad4 SHA-256: 5cd3034d9bed98988044680a65885e5bc4cb4a45473c4f1307e204420b9eb001
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. ClamAV also detected this as Pdf.Phishing.TtraffRobotInstall, indicating a phishing or malicious redirection attempt. The embedded URLs are likely used to distribute further malicious content or lead users to phishing sites.

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://oiaracing.com/uploads/1/3/0/3/130323836/8596063.pdf
    • http://costumiercollection.com/uploads/1/3/0/2/130289319/lanot.pdf
    • http://nasiiclothing.us/uploads/1/3/0/6/130621533/dajekuja.pdf
    • http://artofthefilm.com/uploads/1/3/0/6/130605357/renetarukomupew.pdf
    • https://xokefejozorit.weebly.com/uploads/1/3/0/5/130588847/wokomot_xesovusexosediz_disusipuje.pdf
    • http://hybrid-cl.com/uploads/1/3/0/6/130604544/tariv-lovuxizawo-tapibeboxe.pdf
    • http://nuohotel-zh.devsite-1.com/uploads/1/3/0/6/130639787/130639787.html#action+and+non-action+verbs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000110a.bin
30f562c248ae5fd301a266736b71f7257308e81d056225019edeb035b02a644a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A 8168 bytes
font_01_sfnt_off0000532a.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x532A 2652 bytes

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