Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb430222ac56edb0…

MALICIOUS

PDF

53.7 KB Created: 2020-06-09 01:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b59d9a1ba0c2659fbe4fa7cad9d21f8c SHA-1: d486748a86d60aecaf59555d9c542ebba2718ede SHA-256: cb430222ac56edb0f7269c37342ae05c65e7156c9bf5c69c7aabf61debca1a30
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of external links, many of which point to PDF files on unrelated domains. This suggests a link farm or SEO spam campaign, potentially used to distribute malware or phish for credentials. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://calvertelectrical.com/uploads/1/3/0/6/130604620/130604620.html#%25C3%25B6dem+hem%25C5%259Firelik+bak%25C4%25B1m
    • http://vendettavapes.co.uk/uploads/1/3/0/5/130588377/dufikigemabuxanopek.pdf
    • http://reclaimthespace.com/uploads/1/3/0/5/130544387/xuvexavokozusi_lesonu.pdf
    • http://amsterdamacademy.com/uploads/1/3/1/1/131163763/7877126.pdf
    • http://tenzontransportservices.com/uploads/1/3/0/6/130604326/waxavefevafone.pdf
    • http://williamfelts.com/uploads/1/3/1/4/131452934/87ed1e103c2.pdf
    • https://kumatosew.files.wordpress.com/2020/06/jogiguzudexojusovijikel.pdf
    • https://juzuzinon.files.wordpress.com/2020/06/lareturetazovowipo.pdf
    • https://didejemaba.files.wordpress.com/2020/06/gegegokuzopeniviwenugis.pdf
    • https://romepaxa.files.wordpress.com/2020/06/95486135666.pdf
    • https://mutubugeg.files.wordpress.com/2020/06/mujabap.pdf
    • https://polorapir.files.wordpress.com/2020/06/pekefubiwokukiwagofo.pdf
    • https://suvumeg.files.wordpress.com/2020/06/gilus.pdf
    • https://panujazobafe.files.wordpress.com/2020/06/74809997026.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b43.bin
a9604a8be408ba84c53bf435c61b10eed3f9be3e560e2643b0b8c67fda08126a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B43 16224 bytes

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