Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce1af4de83001ec…

MALICIOUS

PDF

97.6 KB Created: 2021-04-29 05:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 47b862ce777dfd5cd0da1bbffffbfd9c SHA-1: ed2a6c81417418a381c7da608503566dc751ddb5 SHA-256: bce1af4de83001ec0b9eebbffce2eb28be1c0ec382bc87a5229314ab88c038f7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The PDF's structure and content suggest it's part of a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/strik?utm_term=mini+dv+tapes+to+computer+without+camcorder PDF link annotation
    • https://cdn.sqhk.co/kalusoxat/xgw7Zge/mr_wobble_drop_killa_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/ilhgXbf/download_game_chicken_gun_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/Ggchgjg/tonux.pdfIn PDF document text
    • http://meserowogawak.iblogger.org/the_sociopath_next_door_book.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/ijTUFjh/14586655507.pdfIn PDF document text
    • http://midopan.iblogger.org/balotidiguvediriwepomulok.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/tRQiahd/used_police_emergency_lights_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kamabutexukawiv.rf.gd/76493455875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3db86c-5c8d-4572-92a5-c2a86373c88e/unitypoint_clinic_express_care.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a471da59-fcee-4f7e-91fe-c42c29f8576c/what_is_the_first_90_days_of_employment_called.pdfIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_2c382946d1064861b8acc681d953930a.pdf?index=trueIn PDF document text
    • http://juvejuvikanu.epizy.com/american_flag_star_stencil_template.pdfIn PDF document text
    • http://dazulenaredon.rf.gd/pewovobit.pdfIn PDF document text
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_5e8d33828a004ef7ae081064218933e9.pdf?index=trueIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_7ec0f8b4227e45c4995dde4b3df5dcd5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c916668e-bdc7-41ab-9d03-1d3e9c869ca7/60363886756.pdfIn PDF document text
    • http://sonisan.epizy.com/81369061440.pdfIn PDF document text
    • http://narivisifan.rf.gd/american_literature_textbooks_for_11th_grade.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_aa7459d6a1d44c1cb8955725c25a4354.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a23d651e-fdd3-4290-b6ff-5db789627d3f/kawasaki_fh580v_service_manual.pdfIn PDF document text
    • http://vepuguda.rf.gd/chipping_campden_school_sixth_form.pdfIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_243f3840765f45bdb205d213edd0817c.pdf?index=trueIn PDF document text
    • http://wuzegez.epizy.com/xazifo.pdfIn PDF document text
    • http://kunovudulex.rf.gd/35077413451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f47a599-93d1-43b6-9ea1-ccd7309c5485/pinguino_pac_cn120e_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E00 5440 bytes
SHA-256: 7a1b73495dcc0f2ddba1e12eb7dcd130f1fa4025388bbe308836ffdb06226ebc
font_01_sfnt_off00015078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15078 11784 bytes
SHA-256: 938111612dc25c3a00184b82723b818fe78c014e7838e8c25f254b119acf1309