Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4efc6bfe0ea465…

MALICIOUS

PDF

36.0 KB Authoring application: Karbon
MD5: 954fb7e2d618f601033bfe0e46f173aa SHA-1: e64275d854e5f43a83337ce435535fad1e3b0a2b SHA-256: 0d4efc6bfe0ea4651b4bd421a2277d3bb4a40d704ee5519eed1a6ecf8c43e115
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique commonly used in phishing or SEO spam campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded URLs are the primary indicators of this malicious activity.

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://smilyface.org/uploads/1/3/0/6/130620651/8f122349e19.pdf
    • http://ms-j.org/uploads/1/3/0/3/130323103/kapofuniwogete_mepoperu.pdf
    • http://torontogreekdj.com/uploads/1/3/0/6/130621470/wikuwe-maxiralofopab-zotuzubutexad.pdf
    • http://grapheinsarl.net/uploads/1/3/0/7/130775510/61944cc40c7315.pdf
    • http://artsequity2.weebly.com/uploads/1/3/0/3/130323888/180024f32b.pdf
    • http://mobowlusa.com/uploads/1/3/0/2/130289277/0ed647cc3b9f1.pdf
    • http://margotmargaux.com/uploads/1/3/0/6/130604355/6993368.pdf
    • http://mystparanormal.com/uploads/1/3/0/3/130379462/130379462.html#mapa+fisico+mudo+de+america+del+sur+para+imprimir

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fc.bin
02763c8447a77adef6974c2784c21a552853007913b88c013358c50337d862a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC 10144 bytes

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