Malicious PDF — malware analysis report

Static analysis result for SHA-256 6468d3cbddd71e81…

MALICIOUS

PDF

33.5 KB Created: 2020-05-10 02:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f47cc93b914aa56a579033bb2cb44ba0 SHA-1: 553a203b91350a422970ed44667dcf5558540fce SHA-256: 6468d3cbddd71e817a00f3e0d512c1c5889b29a0366b753584691e52ce612dc7
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO link farming or distributing malicious payloads. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, suggesting a malicious intent to redirect users. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://myytr.net/uploads/1/3/0/5/130551399/130551399.html#hydraulic+jack+project+report
    • http://feedbackfoodsafetyconsultantcy.com/uploads/1/3/1/3/131379904/semudabokelik.pdf
    • http://datumobile.com/uploads/1/3/1/6/131606393/470435.pdf
    • http://hismun2020.com/uploads/1/3/0/9/130969027/duvivajo_wazexadari.pdf
    • http://sapphirespaseattle.com/uploads/1/3/1/4/131406149/40315a.pdf
    • http://whanganuicameraclub.com/uploads/1/3/0/8/130874518/wolesimovubesa-zanivex-kovuxa.pdf
    • http://knowemalternative.com/uploads/1/3/0/9/130969353/1676207.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a0c.bin
48dcd330c0d4d6fbd76c000cd9c052fbce994e877553ef7a30f3e08f014be08e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 10136 bytes

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