Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee2273dd2cd2cea…

MALICIOUS

PDF

81.8 KB Created: 2021-03-19 04:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b04223566a21b0eb174d8aa2d43fd87f SHA-1: dfb086566745ea2e048cfb2a0d6cfb98b5f0bc3f SHA-256: dee2273dd2cd2ceab74f0b0b2ec106e434110b33c7b8ac13a4aa21e1c39df0d2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=angielski+dla+senior%25C3%25B3w+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373997/normal_60178631df2d6.pdfIn PDF document text
    • https://cdn.sqhk.co/salasereki/kijgkNn/star_wars_racing_game_n64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384028/normal_5fe0d36e4bcd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407070/normal_603bcbc5cafaa.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/bmgnXYI/withings_health_mate_not_updating_apple_health.pdfIn PDF document text
    • http://leftoutclub.com/bejesese6rtv3.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/jdJjcij/meregerixefeser.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527859/normal_605219f463a8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374704/normal_5fe3e52f105dd.pdfIn PDF document text
    • http://help-copyrighteamservice.com/oxford_advanced_learner_dictionary_10th_edition_free_downloadh5qpz.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/iithjhf/58245581203.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/jgVsOgi/41194498422.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/ligenerubibedajumehmddj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483854/normal_5ffb1201e9e44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408712/normal_5fcb60e74d848.pdfIn PDF document text
    • http://ital-tess.space/89507481779bq5my.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418170/normal_6018616cd626f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_6016eb93be08e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501501/normal_5ff309a99b3be.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/tosevud/karanefavibet.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/98287749293.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/gmat_math_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 5200 bytes
SHA-256: c47d51990d3806ce9e201cefc264bd4e99f7a2881078e9fb999f39caf3730be0
font_01_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 11668 bytes
SHA-256: 53bf76f55af7a88d3e795867759d7e3ca83e5ba01e20c5e249a2615b60b31d4d
font_02_sfnt_off000129b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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