Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b9f5a292363c1de…

MALICIOUS

PDF

72.7 KB Created: 2021-04-09 17:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6fade41bc087c98df6b2bbedc9901d92 SHA-1: 0af0255fbc8265a96bca01706453540b041136fa SHA-256: 6b9f5a292363c1de33ce363c94f8205c7c7f9f9b2bf407f06551b9abb28db675
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru', suggesting a phishing or malware distribution lure. The document body is heavily obfuscated, but the presence of external URIs and link farm characteristics strongly suggests it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=les+miserables+violin+sheet+music+pdf PDF link annotation
    • http://xademubizu.sportsontheweb.net/benadryl_davis_drug_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/Bugiihk/87252265002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459324/normal_60653eb07c2e0.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/autocad_save_black_and_white.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/elric_of_melnibone_book_2.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/hdjiKEQ/best_heroes_grow_empire_rome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5feaf5b64b703.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirerom/8jfTZIW/car_fix_tycoon_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/gjA4jgU/37934188360.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nojemi/tufizawat.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/kigugodekojeluvefap.pdfIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_79094d9c757b43958e8c4e86e7bfefd7.pdf?index=trueIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_691cdc79f63e4b97a8b29e9d1e3c1234.pdf?index=trueIn PDF document text
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_8d01f13497244ecea1403a99f8cdf32d.pdf?index=trueIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/65744355676.pdfIn PDF document text
    • https://109d6476-c6f4-4eee-b84c-907698fb4207.filesusr.com/ugd/0d7ebf_5221d1d1d401497bbe3e4b9424257b6a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakef/annadata_bengali_full_movie_mp4.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_4272273e03e14756ad95c5cd7aaadb75.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB67 5416 bytes
SHA-256: 5d2903881f4c78a9850e18ec085589ef833b4f8460ade67aab63f5476ecaf4d9
font_01_sfnt_off0000dd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 11976 bytes
SHA-256: 42f5c476a648c1b1c65614e248b125be65075d116e75560dffa1ef62aff2b199
font_02_sfnt_off000105b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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