Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2b6a41b7bda335…

MALICIOUS

PDF

27.0 KB Authoring application: GIMP
MD5: 0f23fb3630d17fe98131b38aeadc541e SHA-1: 5d2d89c1ea71ebeb3263af4bdc237efb97f74399 SHA-256: 5b2b6a41b7bda335f9aee37cf6756ff423f582c812a8eef5390070be324fdc2f
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a PDF SEO link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malicious content. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://phoenixusa.org/uploads/1/3/0/5/130551342/dc0109e76.pdf
    • http://sayorale.org/uploads/1/3/0/5/130540182/3092477.pdf
    • http://a3arts.co.uk/uploads/1/3/0/6/130605175/bunekitokogelejufa.pdf
    • http://tisivesala.kalmanmari.info/uploads/2020/01/28/1444748.pdf
    • http://colacotwayartstrail.com/uploads/1/3/0/6/130639217/ca51d5fb.pdf
    • http://mlcvideos.com/uploads/1/3/0/6/130639036/3d278512ca75d.pdf
    • http://arcadesalvacioncarpinteria.com/uploads/1/3/0/4/130476747/3524455.pdf
    • http://adoptme.info/uploads/1/3/0/3/130323506/130323506.html#skills+worksheet+critical+thinking+analogies+harvesting+poaching

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010aa.bin
55d02eafa7064e7e1fb84fae56bb370ae4dea606b849713fe2dbc08a93ea5b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA 6680 bytes

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