Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9d83a25856bcf9…

MALICIOUS

PDF

73.8 KB Created: 2021-05-28 10:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4d1c3eee7811a0c75f2f021b301f9ffd SHA-1: 506479309ea031397027952f3de4f289be3a19fd SHA-256: 0a9d83a25856bcf9f370f8415ceba0a6311eb1eb1e7d41d14fea610a54ba0e4d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=cooking+fever+free+gems+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408712/normal_60390895c3f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_605f5081cdd15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5feb99c951ee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5ff6594ae1a31.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379220/normal_60aff012b0809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490273/normal_6038e6377d717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_601d2a3ac9f46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fca0b80827b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475375/normal_60423e4384efc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_602c6a7884fab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e700997c-4aa4-4185-a6d6-39841a425065/tomenifexuritoseme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e60fb4-2b49-44f3-ae79-c14c38296338/bhagavad_gita_chapter_12_audio_chinmaya_mission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf08145-6804-4ce4-baea-10d30d7813a1/american_natural_history_museum_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35eab972-7325-4d98-a9e7-7aa5e4061868/best_ringtone_music_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/823ffbaa-dc79-40ff-82d6-db1f578ad616/bank_it_officer_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f362093-0497-4dfe-9816-ee046cf2b3d3/poulan_p3314_chainsaw_idle_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8e16b3-27f6-47a8-a1f5-2438d61efd22/college_football_playbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd1e199a-c2e4-426a-a479-32cc409bdd57/the_three_questions_book_activities.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE0 5084 bytes
SHA-256: 7407481f097a96b1926e2c7ebb94ddc545fbb96f95d12af33b56683095dd3073
font_01_sfnt_off0000e124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE124 10244 bytes
SHA-256: bb901443d67298a880abcfe48e2257a1a4c7c1000b43b199c0eaebfe1ac53e84
font_02_sfnt_off00010479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10479 16112 bytes
SHA-256: 1af367e7793f83eb696f23249170989cd0c06f846d2d445429e17c7b9d220a1a

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