Malicious PDF — malware analysis report

Static analysis result for SHA-256 6becc76000cb04ff…

MALICIOUS

PDF

36.2 KB Created: 2020-04-06 12:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 64edb17b5bb5dbecdb526b1759b1093f SHA-1: 5b0da2aca2fa4c929124ff0687b170041d56d113 SHA-256: 6becc76000cb04fff4816d50bec484cf650b8e8bbed6306edda4e910df355418
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded external links. The primary attack pattern observed is the PDF_SEO_LINK_FARM heuristic, which indicates the document is designed to host a link farm. The embedded URLs likely lead to further malicious content or phishing pages, and the document's structure suggests it's part of a larger SEO poisoning or link manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://weatherproofguide.com/uploads/1/3/0/6/130604884/130604884.html#weber+wireless+thermometer+6741+pairing
    • http://route9maine.com/uploads/1/3/0/6/130603692/rewodonoweganul-tagavakifolum-poxuw-kokuwezo.pdf
    • http://niagaracountycsd.services/uploads/1/3/0/6/130639929/kapizevunusesibodexe.pdf
    • http://kesascove.com/uploads/1/3/0/4/130483307/dazuzoveseke.pdf
    • http://playgroup.net/uploads/1/3/0/7/130775744/8564409.pdf
    • http://math-coin.org/uploads/1/3/0/2/130271207/fawegaxopom-xelegemofim-soniz-kepibavitij.pdf
    • http://mikevincentphotography.net/uploads/1/3/0/4/130436071/5995021.pdf
    • http://gvngoodglam.com/uploads/1/3/0/7/130739227/fosebabaguludivetifa.pdf
    • http://genspassion.org/uploads/1/3/0/2/130289196/9739997.pdf
    • http://positivapengar.org/uploads/1/3/0/6/130639327/2653874.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_off00006443.bin
35d7f6e8b398089c8dde921a95c72a6691de582dd7f3219f9a29d3637acca6a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 8368 bytes

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