Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f5b8f53e13e675…

MALICIOUS

PDF

84.3 KB Created: 2021-04-27 21:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0db03972dddab4b309c2c6eea5bad1e7 SHA-1: 9d2f90243e4e68542f9b2b13a06199b0fa545441 SHA-256: 61f5b8f53e13e67544bb216073e03f052d172cb7ee4ec42beab621d65dd6b473
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it is designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=verbos+irregulares+en+ingles+conjugados+en+todos+los+tiempos
    • http://lnstagramsecurity.net/dsc_4020_user_codes2ubrm.pdf
    • http://detonic-ufficiale.website/troubleshooting_dryer_not_drying_clothesvfzvx.pdf
    • https://cdn.sqhk.co/fujotojaxob/hiljhZv/dark_hero_asus_release.pdf
    • http://hurleyshamburgers.com/business_process_engineeringz29rg.pdf
    • http://theraisins.pro/troy_bilt_pony_drive_belt_sizef0zc6.pdf
    • https://cdn.sqhk.co/soxuwutitaw/dPO0ij7/62042906481.pdf
    • http://flymoney.net/statistical_mechanics_mcquarrie2ini3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokudapele/disable_bixby_note_8_android_9.pdf
    • https://s3.amazonaws.com/jenisozazewubo/wixareriko.pdf
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_52ea259f3c674d60b591eeac7adc6948.pdf?index=true
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_0699a5a20d6944aa99a6e0c52fe013d0.pdf?index=true
    • https://s3.amazonaws.com/jolozidabi/pioneer_vsx-530-k_manual_espaol.pdf
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_53971f4139df4f159899fc8dcc775089.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8692cc0a-d9c7-46f9-a6df-f091775f2910/79612982465.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/words_that_begin_with_short_e_worksheets.pdf
    • https://s3.amazonaws.com/jaloto/63430233902.pdf
    • https://uploads.strikinglycdn.com/files/52f0996f-29b6-4de8-967f-63396adac911/materials_selection_in_mechanical_design_ashby_5th_edition.pdf
    • https://s3.amazonaws.com/wobuzisibal/tixebevit.pdf
    • https://s3.amazonaws.com/fadupazageraf/craftsman_yts_3000_transmission_fluid_change.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f2.bin
bf4952d177249482cb6a83fee2c5dbc03186896d943cfee621ffb6e7f3701a02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 5572 bytes
font_01_sfnt_off000107d2.bin
31aea6c71ae9600de3d97e9d1e5b1a0ea67a74c5385713874e0605747f292a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 10684 bytes
font_02_sfnt_off00012c0e.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0E 16204 bytes

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