Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c2b4c76503a72d…

MALICIOUS

PDF

100.9 KB Created: 2021-03-20 15:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cafce73d31bc93bf5217cabe8bdc71d0 SHA-1: 185d145af22292281039ade671e837a9eef7aa17 SHA-256: 73c2b4c76503a72d54497e1b96bab0990e03bfc82c820b8f5979115ec699cb14
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded external links, with one suspicious URL pointing to 'ponafet.ru'. The presence of numerous links suggests an attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://ponafet.ru/award?keyword=dibujarte+pdf+1 PDF link annotation
    • http://tadajixilatu.scienceontheweb.net/tkrs_akreditasi.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/dafevefor.pdfIn PDF document text
    • http://wirelessinfo.ru/nonevateselomezgqkdk.pdfIn PDF document text
    • http://brumbum3.xyz/harry_potter_sound_clips_free_downloadkase4.pdfIn PDF document text
    • http://latencfsrt.space/kupujuwomigiwimp72o0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_28db884e08b24e30af9bd0b1433916d9.pdf?index=trueIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_b04c99e2f52849ec99ec22c425c01805.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bogeguva/entomophagy_a_sustainable_solution_khan_academy_answers.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/49115886713.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/how_do_vegetation_and_slope_affect_runoff.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/wugurewobikiwuwarek.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_18a82c8b54504721bcdba014674ebc55.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_8c2ee3205c5f417196bf5dfdc6a3037f.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_80275890f42442caa368827c4af5bc19.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_db919f3307ea4a54bf130236426148d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/jubixapejipuro.pdfIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_5ec454987ef1428c8c5c77a6e4f2fe61.pdf?index=trueIn PDF document text
    • https://73af689e-4c80-4f62-99d3-7a886641ad81.filesusr.com/ugd/3b5dd9_08e240883a3949b5a9b5f135d0bdc775.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/badodemebo/fikipikalaket.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://www.scribd.com/embeds/82922878/content?start_page=1&view_modIn 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_off0001455b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455B 5092 bytes
SHA-256: f053eb848babe5b9188523fa4777b12b2c74f56a1453ca9c136a70645883c623
font_01_sfnt_off000156c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156C1 14684 bytes
SHA-256: 1c5dab8590c6570277bd62cf273f76effab556ecf0457bc2b2eca308052d3e99

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