Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ce74741a205b54…

MALICIOUS

PDF

81.4 KB Created: 2021-04-02 08:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 32b3a5dc95dc31cd5b71aa1900065a7e SHA-1: b897f83a9453595df63e88804bc73adfd704b9d8 SHA-256: 25ce74741a205b54d32ae01e7c5c4fa903fd236df1432c1e50e0d4c371b3b20c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/award?keyword=business+plan+sample+format+pdf PDF link annotation
    • https://cdn.sqhk.co/xekemini/bUxY9jh/kupinasisejomijigim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_6041ee8510ae5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477892/normal_5fe0caf0f0188.pdfIn PDF document text
    • https://cdn.sqhk.co/lofopapenow/aVgcLSx/small_alphabet_letters_tracing_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/rutesawir/hhh5ibX/amazeballs_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/jcEhbPC/frontline_commando_d-_day_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383568/normal_603948afb2d9e.pdfIn PDF document text
    • http://idealslimitaly-official.site/what_is_the_function_of_the_correctional_system6xx6m.pdfIn PDF document text
    • https://cdn.sqhk.co/mevexobuzur/iQidihL/plane_craft_square_air_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5fd3175c272f4.pdfIn PDF document text
    • http://momentikshop.space/tukemagokitavowuzb472o.pdfIn PDF document text
    • https://cdn.sqhk.co/lasanamemego/EjjpDgd/islands_in_the_stream_original_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigizakeku/hiaj6Nv/management_textbook_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403819/normal_5fedc7a994fd4.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/8612646298659o15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466379/normal_5ff8127072151.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/b7wjghj/kemiparolopedapavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_5fd77f1e047cf.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5fecd1f92b9ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_6026f68bea044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_601a77acef217.pdfIn PDF document text
    • http://startbastar.online/metal_gear_2_substance_iso1thbm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 5236 bytes
SHA-256: eebc41fd3de72763661cf851ccc466f4409a00af4c3d9ae0dfb30ff9f2a67ad4
font_01_sfnt_off000113cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CC 10540 bytes
SHA-256: 6bc4dc87a21d6ae9c6fc6d1a2118f8ba5b9c6477cce52febb60a221aa29bcbe3

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