Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda47cf5cd13d8ef…

MALICIOUS

PDF

96.3 KB Created: 2021-03-08 11:34:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 84e9f3eaa4968f480f23e7bfce0a2177 SHA-1: 47ed4d73513f9f90bae3cdf300ccdb8e5fa73a99 SHA-256: fda47cf5cd13d8ef72c0dd6e41590dd5a81c6500a186fd18c53056aa52ca74d0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or SEO spam lure. The document contains numerous external links, many pointing to disposable domains, designed to redirect users to other sites. The primary malicious URL identified is https://seumenha.ru/award?keyword=douglas+adams+dirk+gently+holistic+detective+agency+pdf, which is likely part of a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/award?keyword=douglas+adams+dirk+gently+holistic+detective+agency+pdf PDF link annotation
    • https://cdn.sqhk.co/pasivuzuke/WRihBgo/my_body_parts_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502246/normal_5fef4ba76d6d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496824/normal_5fd789042e0e7.pdfIn PDF document text
    • https://cdn.sqhk.co/vixonafom/UNDQxKT/white_cheetah_running_shoes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488582/normal_5fe3dc440325b.pdfIn PDF document text
    • https://cdn.sqhk.co/moturira/iEhhXhc/brothers_in_arms_3_hack_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_a9b0eab100654eb6ba47c4fc40867f09.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/240af235-f4d7-407d-af8f-387b1e44ce23/76276402671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd93a0c-fce5-46aa-90a3-c9a89d8c390f/how_to_remove_water_softener_tank.pdfIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_d88ed8f012074a7a91adf9807b1dd76f.pdf?index=trueIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_45e432483b024de38bdca081db302e39.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4e93a8-081a-4ba5-823c-adfc24da9dd7/stephen_king_books_made_to_movies.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_9ba05179d71344c5be8f44af70f366ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b759ec-c008-4bfb-a03e-34df97a6d304/rovifagavabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f89004a2-3527-4584-8b2c-cfc50fe9c230/buwabalugipefapif.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_3abd938e19534e70a628427a78501e80.pdf?index=trueIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_3f8505b29a654fee8c5b1afa01d17993.pdf?index=trueIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_b1f40b1d1d5a4b53b2059b0a707c4c4b.pdf?index=trueIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_07fa08079ab5427990a27358deadc2c2.pdf?index=trueIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_1278da356ad14bb4a0fedd46375fd187.pdf?index=trueIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_af279b1f810e438badd3cfe7ffd2491b.pdf?index=trueIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_7ff5bba4c0014512b29bffaeac12f7af.pdf?index=trueIn PDF document text
    • https://05b56818-8b0b-4484-a411-4f1234233f1c.filesusr.com/ugd/e49726_c1dca30052e84824893d197449cb5bad.pdf?index=trueIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_edc8d37439384d1889674d1e95768c29.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5D 5796 bytes
SHA-256: 1f3b791b0f3bf3d16a88b761413a4b4591a9f97d81fd4513baed33168c442c88
font_01_sfnt_off00014f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F05 10608 bytes
SHA-256: f3cb6aee41de69551c5cb3487be7114a696baa1cecfcf52bcc29e7bb092d1b8f