Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0a4d5cdf619c0e…

MALICIOUS

PDF

76.9 KB Created: 2021-05-13 11:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 573ebc671f5a0a9643386c3b694b4a6d SHA-1: 21f43fb02035035757e9af62f234aef33171c819 SHA-256: 4e0a4d5cdf619c0e52f1c8585a9fe26ede098dd2c6c9525e5244fad64f76ac83
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to obscure malicious destinations or for SEO manipulation. The presence of external URIs suggests the document's primary purpose is to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/strik?utm_term=cirque+du+freak+book+4+read+online PDF link annotation
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/3774b.pdfIn PDF document text
    • https://cdn.sqhk.co/lezubenewago/15jeqhi/feral_movie_parents_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_60436a0124c48.pdfIn PDF document text
    • https://dugepawegozil.weebly.com/uploads/1/3/1/6/131606694/303457.pdfIn PDF document text
    • https://vepegusekukoj.weebly.com/uploads/1/3/4/4/134470637/d626b5f8b2.pdfIn PDF document text
    • http://zezarujewida.iblogger.org/84411443652.pdfIn PDF document text
    • https://talotemeve.weebly.com/uploads/1/3/1/6/131606578/xurobet-guwobekezeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472481/normal_6036f59c52a65.pdfIn PDF document text
    • https://vuxupiwiruxip.weebly.com/uploads/1/3/0/9/130969000/3744620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_6028e388c41cf.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/67856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_60467a28ce795.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/Ygegdhd/centipede_game_system.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/7052993.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/GNjghbg/radiant_definition_urban_dictionary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479224/normal_5ffc230a37283.pdfIn PDF document text
    • https://guzarederojem.weebly.com/uploads/1/3/4/3/134392385/virigosugumavud.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/1783894.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixufesivefole.rf.gd/gizowobovajelufukove.pdfIn PDF document text
    • http://xeropejuw.rf.gd/forizekikifakumazipenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59f9178-8ffa-4317-b825-a6b6469ec3b9/genivexaxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0976d09-38cd-4b3a-aa8a-f22a69305dcf/how_many_diary_of_a_wimpy_kid_films_are_there.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_off0000f0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D0 5048 bytes
SHA-256: 96abc0b4462321895cfd804d0e29d360b7347d3bb902c40dd2c3724f1af8632a
font_01_sfnt_off0001020d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 10488 bytes
SHA-256: 2fe852a13fdce76c3f24067beb65e3b0d2124097f93f567ca46458ad47c7ac40

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