Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee605a3d2fcba58…

MALICIOUS

PDF

33.9 KB Created: 2020-04-03 20:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e10143fa36462a1c72e779c387044d12 SHA-1: eb6c1b05a9f5031afa3788fe046b192c73def912 SHA-256: fee605a3d2fcba58b6d8cd344dfce38bddfe9f6e94ba5104678c355ddcb29c48
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which follow a similar numeric-slug pattern, indicating a link farm designed to direct users to various websites. The ML classifier strongly flagged this PDF as malicious. The presence of numerous unknown-reputation URLs suggests a broad phishing or SEO poisoning campaign.

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://thehappygirlstore.com/uploads/1/3/0/8/130813320/130813320.html#sony+dream+machine+icf-c218+change+b
    • http://roborule.com/uploads/1/3/0/7/130775384/4706499.pdf
    • http://absonabudget.com/uploads/1/3/0/4/130476700/da14797a54a02e.pdf
    • http://hillyercpa.com/uploads/1/3/0/4/130483346/fc03647.pdf
    • http://builder.anikosspa.net/uploads/1/3/0/8/130874439/0cc525a170.pdf
    • http://jingcaitourism.com/uploads/1/3/0/8/130814076/ef4274554374a01.pdf
    • http://aquarelclothing.com/uploads/1/3/0/8/130874313/8461620.pdf
    • http://luciebakes.ca/uploads/1/3/0/4/130483265/9199784.pdf
    • http://katiekerwick.com/uploads/1/3/0/6/130621429/5687392.pdf
    • http://mcjinmobiliaria.com/uploads/1/3/0/6/130620642/5824879.pdf
    • http://oroconsulting.com/uploads/1/3/0/6/130620921/8968548.pdf
    • http://baby-blue-elephant.com/uploads/1/3/0/6/130620982/bujemali.pdf
    • http://laurarobijnsphotography.com/uploads/1/3/0/2/130287503/melabik_dowuveriw_wofubos.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_off00005d01.bin
1dabf10f1029c902668a82c245bb332d67b14c97c9189cb91fea8ab6bcbbb830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D01 7568 bytes

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