Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47bc159c3111c03…

MALICIOUS

PDF

35.1 KB Created: 2020-04-01 12:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cecbcec4765506e03220700caccb6d03 SHA-1: 7c65246d92890880571ba955e809d7aa8a42d8e8 SHA-256: f47bc159c3111c03410070b8c3f6ad6b5caa0c82f499d4cd758f1ebc20dda66b
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. The ML classifier also strongly indicated maliciousness.

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://sanfranciscopeacetreaty.org/uploads/1/3/1/0/131070867/131070867.html#ct+drs+form+op-424
    • http://misscassandralaurionartwork.com/uploads/1/3/0/6/130620730/satodedarosesenidu.pdf
    • http://mysecureverification.org/uploads/1/3/0/9/130969967/1e26870dd71395.pdf
    • http://mainstreetlaundry.info/uploads/1/3/0/8/130873804/6132206.pdf
    • http://designersconstruction.com/uploads/1/3/0/7/130740045/jafek.pdf
    • http://maedaleather.com/uploads/1/3/0/4/130476642/1638484.pdf
    • http://wedding-photography-nyc.com/uploads/1/3/0/8/130813701/8700427.pdf
    • http://a-mforestry.com/uploads/1/3/0/6/130639393/kibekatidenon.pdf
    • http://thatanimalgroup.org/uploads/1/3/1/4/131408248/6a1d6e1c87.pdf
    • http://lesbutineusesdemarcoux.com/uploads/1/3/0/4/130477363/8722618.pdf
    • http://krownedbykenyakollection.shop/uploads/1/3/0/5/130589339/puxejatitubu.pdf
    • http://verchelemosley.com/uploads/1/3/0/6/130620998/paxomexewefek_zazivupapajoxip_pifavobi_nidufik.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_off00006098.bin
a7a1c8d8b28263e4e27b1585c0242c10b93e2c18de37662f920063612db1a227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6098 8108 bytes

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