Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bf8889b4fe3e68…

MALICIOUS

PDF

80.5 KB Created: 2021-04-24 05:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8592e8e91f152bba9fad9d6f56ccfc6d SHA-1: 7ad41909a0a5a08c11767c4873f287363aa19606 SHA-256: c0bf8889b4fe3e687eb4b06353c2eb24485ab148bd2139c650b2c25538fb6c43
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=how+to+uninstall+rosetta+stone+from+mac
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fd2c8a1d00e0.pdf
    • http://zomosidotewe.sportsontheweb.net/star_interview_techniques.pdf
    • http://vadosixajobirug.mygamesonline.org/hebrew_bible_names_and_meaning.pdf
    • http://zujoxuxosaja.getenjoyment.net/sonifojuzovijopuvikog.pdf
    • http://lisuzigerob.mygamesonline.org/wubomusasun.pdf
    • https://static.s123-cdn-static.com/uploads/4421350/normal_60059f74d3d8b.pdf
    • https://cdn-cms.f-static.net/uploads/4414153/normal_60254ad2abdc2.pdf
    • http://gejikojaki.scienceontheweb.net/39120189971.pdf
    • https://cdn.sqhk.co/botajedelej/haCigCU/basic_confidentiality_agreement_template_australia.pdf
    • https://cdn.sqhk.co/rabataxuvax/4icVAxD/bet_login_24.pdf
    • https://static.s123-cdn-static.com/uploads/4476015/normal_5fe3be1fd47a0.pdf
    • http://linavaluviriv.getenjoyment.net/mefidateruzazuzamoburage.pdf
    • https://cdn.sqhk.co/berazanoga/dehhtl3/snakehead_fish_record_maryland.pdf
    • http://sopesukenapad.scienceontheweb.net/95807702704.pdf
    • https://cdn-cms.f-static.net/uploads/4463552/normal_605d94785023a.pdf
    • http://tixesikixux.mygamesonline.org/mastering_blockchain_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9b7cf2e3-8abe-4195-bbe1-9452e07115c3/46559306963.pdf
    • https://uploads.strikinglycdn.com/files/f19ac998-c9c5-4c05-95de-e99a78c1cc5d/garbh_sanskar_book_in_hindi_download.pdf
    • https://s3.amazonaws.com/bupijila/pudipegalisalakosirime.pdf
    • https://uploads.strikinglycdn.com/files/cead412f-7133-4f1d-92e1-a66ebf063e24/bunebazadusojibavujuje.pdf
    • https://s3.amazonaws.com/loxopudizus/cashless_economy_in_india_project.pdf
    • https://uploads.strikinglycdn.com/files/555a871b-d93a-45e6-9c4f-c5031cf75252/what_are_german_modal_verbs.pdf
    • https://s3.amazonaws.com/metubevozisul/a_street_cat_named_bob_book_age_rating.pdf
    • https://uploads.strikinglycdn.com/files/4ce45508-aeaf-4494-b715-ad5a022baca0/westinghouse_timer_outlet.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_off0000fb85.bin
8703eb9c3d5b659b6aa59240cadf95754616d947c0d73d8553ad9b081694650d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 5080 bytes
font_01_sfnt_off00010cc7.bin
67f0ab3a3b0b8355b2495361068f7c619b0d94a84796efe8d6664d1f41f4a45d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 11512 bytes

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