Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce3d4c2d33aa106…

MALICIOUS

PDF

36.3 KB Created: 2020-04-05 09:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0c3b9776fc098bd78eecfd0f3cd12566 SHA-1: b000687d3b69417a0772da50d09085a87cdf59fd SHA-256: 7ce3d4c2d33aa106c67e7c9b0bb0dc95725b9663e0874797833f2a6891b0c18c
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which appear to be SEO-optimized PDF files. This suggests a link farm or content distribution network designed to generate traffic or host further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links aligns with techniques used for SEO manipulation and potentially distributing malware.

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://bloodblisterapparel.com/uploads/1/3/0/5/130588403/130588403.html#jam+trance+mini+wireless+speaker+hx-p460+manual
    • http://cityheritage.net/uploads/1/3/1/3/131384660/zesamepafe.pdf
    • http://caseybradleyarts.com/uploads/1/3/0/6/130639369/wibosizetixopa_fifitaz.pdf
    • http://napavalleyentertaining.com/uploads/1/3/0/6/130620927/notezaxokerizaw-vixinuzis.pdf
    • http://ndsucceed.com/uploads/1/3/0/8/130813643/6698725.pdf
    • http://msgolfforeacure.com/uploads/1/3/0/7/130776068/49da50df7.pdf
    • http://simonfrenchauthor.com/uploads/1/3/1/0/131070849/953578.pdf
    • http://coolroofsja.com/uploads/1/3/0/2/130271031/vusifexajatijotus.pdf
    • http://quartertofour.net/uploads/1/3/0/4/130488415/kunavavasotipi_poroj_wikitewijo.pdf
    • http://mirukim3d.com/uploads/1/3/0/8/130813413/pelujevodix_lolunaweneju_vilupawilaloma.pdf
    • http://drelizabethfisher.com/uploads/1/3/0/7/130776148/2595145.pdf
    • http://mindforyou.org/uploads/1/3/0/8/130813747/mututuxuwe.pdf
    • http://urbanpolebarns.com/uploads/1/3/0/6/130620176/9889820.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_off000061fe.bin
eb2f6b89459626658b291ff6b547799d4592068e4eb6ac8b974729995c0bb1a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 8480 bytes

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