Malicious PDF — malware analysis report

Static analysis result for SHA-256 76dadddc7dd716d5…

MALICIOUS

PDF

78.8 KB Created: 2021-02-27 15:09:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2ee25a5877653dbca8496b46743d6761 SHA-1: 6920bc76938b97094409f4d6bdd525f121f5722a SHA-256: 76dadddc7dd716d5b8721904bdeafb1e351e971fba1b43f8e921d1a6b4eca62a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with a primary external URI pointing to 'dugedepap.ru'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation for client execution.

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/award?keyword=maya+banks+kgi+series+book+13 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5fd924d5aced1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_602c45d3957f3.pdfIn PDF document text
    • https://cdn.sqhk.co/xikokopek/2gdibHb/41533178044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468572/normal_60206e7a51c65.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/digovisubenedu.pdfIn PDF document text
    • http://geags.com/193v75In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/github_mapbox_android_sdk.pdfIn PDF document text
    • http://fedetikapore.epizy.com/dogejidixixevazedalexuxa.pdfIn PDF document text
    • http://muvusewogazobil.rf.gd/vcredist_x86._exe_2015_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/rebgon_bodo_movie_songs.pdfIn PDF document text
    • http://kevikawimal.epizy.com/neil_gaiman_neverwhere_book_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/webcam_companion_4_activation_code_free.pdfIn PDF document text
    • http://povemuxituziv.epizy.com/the_adventures_of_huckleberry_finn_movie_1939_cast.pdfIn PDF document text
    • http://wadekazu.epizy.com/rarimibozifopakuni.pdfIn PDF document text
    • http://kokokifutalikop.epizy.com/juzuzeramojuw.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_off0000f684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 5348 bytes
SHA-256: f0a0adb2959e4e7b092d87cf558863fd67eadc4b8dca77841772f3392dd3167a
font_01_sfnt_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 11096 bytes
SHA-256: c5a536990a93ee53964f9ac32ea00c456ed3e68ba86b573ac59cfe122857f24a

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