Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f438f586c6254b9…

MALICIOUS

PDF

94.7 KB Created: 2021-04-05 10:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18bc038ff1bb9f67f6d5531607b82a0c SHA-1: 9f1012017c42df7129481d34dcbda512cdd2a7b2 SHA-256: 5f438f586c6254b9c2d57dea6d641db1eaa3b89136e07de86c981e6569ef0c7d
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 website designed to appear as search results. This is a common phishing tactic to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of embedded URLs suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/wix?keyword=matriarch+2018+rotten+tomatoes
    • http://anarchymedya.com/odia_album_a_to_zzvcgn.pdf
    • https://cdn.sqhk.co/bupabumo/U8rejce/dekud.pdf
    • http://shopsupergood.site/wugabotab0svi0.pdf
    • https://cdn.sqhk.co/fumamimed/ojgjeDZ/furniture_mods_for_minecraft_xbox_one.pdf
    • http://krepezh.guru/383022537694ivml.pdf
    • http://lazadacostumercenter.com/42964654062rmidy.pdf
    • https://cdn.sqhk.co/fufowomusixi/ghegcjc/24086294480.pdf
    • https://static.s123-cdn-static.com/uploads/4469349/normal_5ff5f2d75d128.pdf
    • https://cdn-cms.f-static.net/uploads/4421200/normal_606a1bd7372af.pdf
    • https://cdn-cms.f-static.net/uploads/4369904/normal_6067d55515c88.pdf
    • http://e-sparks.ru/phase_5_phonics_assessment_analysis_sheet4qaho.pdf
    • https://cdn-cms.f-static.net/uploads/4369914/normal_6011d636b1c9a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pusori/87008758134.pdf
    • https://s3.amazonaws.com/mexesazaxasa/vodekupavizovigoja.pdf
    • https://s3.amazonaws.com/lewuli/xukasenidemodokefegazar.pdf
    • https://s3.amazonaws.com/bidemewufa/salton_food_dehydrator_instruction_manual.pdf
    • https://s3.amazonaws.com/zuponefi/51442805689.pdf
    • https://s3.amazonaws.com/dexodekelaseki/titans_curse_book_review.pdf
    • https://uploads.strikinglycdn.com/files/81ac82e9-30ee-4aa7-a029-676fc2a8b885/how_to_increase_a_shape_by_a_scale_factor.pdf
    • https://s3.amazonaws.com/vipuxafol/52954290979.pdf
    • https://uploads.strikinglycdn.com/files/8214de79-edac-4bc9-88d7-7514f8f99360/fifty_shades_darker_1080p_dual_audio_download.pdf
    • https://s3.amazonaws.com/temujonuwu/71770173137.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_off0001341e.bin
4f89bde745f49d8ebd5a123406bcb5fa4090e520b5f9669a13828da6c252a0e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1341E 5532 bytes
font_01_sfnt_off000146cf.bin
4f51cfcbad4d9943a434929e51df477b1468e39eb75e8530fdf25fad9fed1685
pdf-font-stream PDF embedded font (sfnt) at offset 0x146CF 11568 bytes