Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bf23c925e21a685…

MALICIOUS

PDF

72.6 KB Created: 2021-03-09 01:28:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aaaddf513f78fbd632f1ad445c08b226 SHA-1: c7b05b4fa6557408516eb8c7594a6e8e89850e21 SHA-256: 5bf23c925e21a685415822f667297660e578ac5e499d90a33422261bc444236e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/award?keyword=unisa+application+for+admission+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462075/normal_5fd296f643a00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393358/normal_5fe17c907a1a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_6029638d444f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484376/normal_5ff41378d6597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_09f50554de50457aa071bac9177e9a39.pdf?index=trueIn PDF document text
    • http://zavivemigowoson.epizy.com/5790719888.pdfIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_9fc35b8943ab49e0a02170754ef47413.pdf?index=trueIn PDF document text
    • https://12dd324c-696b-4d67-8c19-991f3eacec2c.filesusr.com/ugd/eeb7bd_a36433f5feca42bda2a54060e5c054c2.pdf?index=trueIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_8b93d81c83ea492ea2c7212196dd8f74.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/180c5f76-d647-478a-95b2-e0862c2c9984/lodedasisu.pdfIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_1e2120b827b54218bff1345fc33b5168.pdf?index=trueIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_3e0fcd083f594f97ad88dbfbc83582f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nalifij/muleziwuximolobepegolerif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3218ac90-7c06-4be0-bad6-9a2f34638db0/11630925870.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_fad93da803544997a1ed334eb21261a2.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_072c2e6c8b22482a856b89c6931ec383.pdf?index=trueIn PDF document text
    • http://duvojawakupo.rf.gd/muzizulakufesutid.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_9691c79600414e1585f5f9f7ec97dfd1.pdf?index=trueIn PDF document text
    • http://refulixal.rf.gd/84175598241.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/vizio_e470i-ao_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/international_journal_of_biological_macromolecules_author_guidelines.pdfIn 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_off0000de82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE82 5564 bytes
SHA-256: f5fad19511cb499f27a659b4ed758d5d1e680411d78f78071a809fb5d3b63430
font_01_sfnt_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 10504 bytes
SHA-256: 0b08aff842ed876fc7f03ee1c6668acb21ac4aad46e3f0417616eb7465d4d289

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