Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a8e431bc155154…

MALICIOUS

PDF

77.8 KB Created: 2021-03-01 12:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2366137a759662fce87fc3ca47942157 SHA-1: c428367cf7f4ec771795781d86db379c09f7a341 SHA-256: 06a8e431bc155154f90709690ae7e999dc205db73cd2f3f020edaf162bd16ede
134 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of urgency lures in the document body further supports a phishing attack pattern, likely designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/strik?utm_term=steroid+injection+in+knee+cost PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378167/normal_60241aa68993a.pdfIn PDF document text
    • http://vasezasu.22web.org/feedback_form_for_parents_workshop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fd3084329ad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5fe97c37e85d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_600f572e3f664.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/2818522626.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/35645015941.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459468/normal_5ff096019d4dc.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/4jdghbJ/blue_light_glasses_prescription.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374379/normal_5fcb68c87c17d.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/hamilton_beach_coffee_carafe_replacement_49980a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495271/normal_5fe7668e3639d.pdfIn PDF document text
    • https://cdn.sqhk.co/dumudegurit/KDhiaji/gaming_wallpapers_4k_for_pc_download.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/jazzy_select_elite_troubleshooting.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/Fghjfja/shareit_application_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/19596217170.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/puturelivixixunatarogoma.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/5079450820.pdfIn PDF document text
    • http://ladinuronabo.epizy.com/lonely_planet_japan_free.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_off0000f452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF452 4936 bytes
SHA-256: 4187b34102bda0f626b5f349ebdda1ca5959205615b97a00ff5140f2c7f040d0
font_01_sfnt_off00010534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10534 10728 bytes
SHA-256: dc2b1cab5c18a11152aac22eea1c5138e0dd10022092aff997b44be21b143e6b

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