Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fc60b200d0d34a…

MALICIOUS

PDF

80.4 KB Created: 2021-04-04 13:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 455a4ecffcbb3bf80462060e8420d866 SHA-1: b97d7136c1e902c527a2c929cc4551a11dfb9962 SHA-256: 75fc60b200d0d34a5e5a60e869806d0f81c35cceb05741522b846de52ef17a4d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are dynamically generated, indicating a potential link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://botokaw.ru/award?keyword=graphic+designer+portfolio+pdf+samples
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/ruzigavuzuvazi-jotuxurok-xiwuwafel-pibamujofikus.pdf
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5ff6adf024671.pdf
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5ff406811f309.pdf
    • https://cdn-cms.f-static.net/uploads/4368221/normal_6023428413147.pdf
    • https://fofezuse.weebly.com/uploads/1/3/0/7/130739341/guzeviso-xigekofe-zamomubaworeja.pdf
    • https://cdn-cms.f-static.net/uploads/4421218/normal_6049c49cea2a4.pdf
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/fuvipibejojiwoweta.pdf
    • https://gefawopunov.weebly.com/uploads/1/3/0/9/130969454/jitasexelakozanotub.pdf
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/bb6105e35ce6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/88e56e00-2e28-489c-acd4-af83bc11f5d5/nitup.pdf
    • https://uploads.strikinglycdn.com/files/3924c0f9-8da5-49f9-a953-e095f69d2a50/78367945955.pdf
    • http://pimuxexud.epizy.com/xefugivefekipin.pdf
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_590303b1b0364a36982ece379361d675.pdf?index=true
    • https://uploads.strikinglycdn.com/files/736e4290-1017-4469-8dde-6be7b691e4c8/wisimom.pdf
    • https://0c17d2ad-06a2-4efd-9128-26148cac6670.filesusr.com/ugd/44320b_b5f8803f56274cd08e8fc388566b4a27.pdf?index=true
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_193eef714f4f400e82ea5adc5bd65d32.pdf?index=true
    • https://uploads.strikinglycdn.com/files/83b43f83-a446-4d06-82df-8896d9fa5b27/the_lord_of_the_rings_the_fellowship_of_the_ring_summary_movie.pdf
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_a670212436ea4480bb6343ad307d6ce1.pdf?index=true
    • http://fasorevurug.rf.gd/baby_names_boy_tamil.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd17.bin
e09cc102f2c26bdf60e804f2764527964bfbf034eeca1d38f584e02e89b18325		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 5600 bytes
font_01_sfnt_off00010ffe.bin
3d350398b2e0490a7cd40e5a599ec545dc35affd778bfb2d7eea0d8d3c4dec52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFE 10660 bytes

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