Malicious PDF — malware analysis report

Static analysis result for SHA-256 92166cc83d272cb3…

MALICIOUS

PDF

40.0 KB Created: 2020-05-21 18:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc0971ed7f7fddc1b3dc2b83c31a2435 SHA-1: e5b34ec28d513f4df4954b624a9eb695cbc50481 SHA-256: 92166cc83d272cb350ef42bd0c54affb121d172cdb972a3a2ed1f9b37f051805
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on various domains, suggesting a link farm or SEO spam campaign. The document body, though malformed, contains text referencing 'Raci matrix excel template free' and the primary URL, indicating a lure to a potentially malicious website. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bejustalittlebetter.com/uploads/1/3/0/3/130379354/130379354.html#raci+matrix+excel+template+free
    • http://southernacappellasound.org/uploads/1/3/0/5/130543020/5640824.pdf
    • http://jaidadance.com/uploads/1/3/0/6/130620716/wexoxo-jafamofizomi-xujesipugoras.pdf
    • http://rf-consultora.com/uploads/1/3/1/1/131163640/vudak.pdf
    • http://myfordf150raptor.com/uploads/1/3/0/8/130874296/2553611.pdf
    • http://bethanyblessing.org/uploads/1/3/1/4/131453216/164550.pdf
    • http://zenorganization.org/uploads/1/3/2/3/132303022/21d30adc28.pdf
    • http://garrettdale.com/uploads/1/3/0/5/130543870/e5c09f3a65491c2.pdf
    • http://bezzinadesigns.com/uploads/1/3/0/6/130640142/fugexukiwuxezim.pdf
    • http://itisfantastic.com/uploads/1/3/0/9/130969818/2859278.pdf
    • http://getyourfloridaback.org/uploads/1/3/0/8/130873914/0aa9898886.pdf
    • http://altruisticresults.com/uploads/1/3/0/9/130968958/b86c8df273d.pdf
    • http://creativelynelly.com/uploads/1/3/0/2/130291809/wibadigu_suxefifipirul_tidemobi_zimavas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fff.bin
df0ace7a4665613877b7f6dffe5209f17884f318f3dc3d55ad1b012fe3c3ff45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFF 9000 bytes
font_01_sfnt_off0000721b.bin
97803a8cad691155702b10fb1f1bde90fb9f24231aa597b75dac1e60a452e3da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721B 10108 bytes

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