Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b700190b94b3f3…

MALICIOUS

PDF

78.4 KB Created: 2021-03-16 19:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5084e9caf3f4d89b1e06455368c457b9 SHA-1: bc56ecdc4fb9696700ab5ba1ab09dade9c8eecce SHA-256: c8b700190b94b3f31ffa4b94078c48eb0dbdfbd055695645f4c549b1cd1f972d
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 as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains keywords related to 'breach of contract' and points to external URLs, suggesting a phishing or scam attempt. The presence of embedded URIs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support the conclusion that the document is designed to redirect users to potentially harmful websites.

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://lozipotod.ru/award?keyword=breach+of+contract+definition+pdf PDF link annotation
    • http://nolubebizufusim.iblogger.org/sizonirezunetave.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/xiwusiviro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_602693b33661b.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/84917858067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421629/normal_601e90f917930.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/blackmagic_atem_mini_pro_iso_production_switcher.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365586/normal_5ff897e7d32d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_6015b663eff0d.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/free_math_word_search_puzzles_printable.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/how_to_write_a_homebrew_dd_campaign.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/also_sprach_zarathustra_concert_band.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/openpilot_cc3d_evo_flight_controller.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fcc9e7ed94f7.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/tekowomofijifazakejoda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/which_garmin_handheld_gps_is_best.pdfIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_656947bd9dce45869f38499c18ed431f.pdf?index=trueIn PDF document text
    • http://wolobugoxew.myartsonline.com/29977407837.pdfIn PDF document text
    • http://xojokigelofa.rf.gd/cyber_security_insurance_policy_template.pdfIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_400e392cdaa043dba5d2729d8e590d7e.pdf?index=trueIn PDF document text
    • http://rosajeku.myartsonline.com/vezaxidazana.pdfIn PDF document text
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_a267eec4f07941fd9f7a431c48185c89.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54A 5080 bytes
SHA-256: c9925fd93552ce73cadf5c7a876c97ec6d65c104d6505d10b7b3393d6bae9609
font_01_sfnt_off00010690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10690 10696 bytes
SHA-256: abc7801f9faa90d894438b32007d4610b4211c36cb243c26967ad5eaae2baa98

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