Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee8f08272ebb671…

MALICIOUS

PDF

70.4 KB Created: 2021-06-11 10:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9233de8072938353474fb4ec6440cd3a SHA-1: eda687bb9b4c510c2fa26f238c38ae803d147805 SHA-256: 6ee8f08272ebb67147b0da3d6008ab06f2928b4be74ffed6cc58aed6db55a780
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to link farms hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a social engineering tactic to trick users into visiting malicious sites or downloading further payloads.

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://garglob.ru/pbw?utm_term=cars+2+dual+audio+download
    • https://cdn-cms.f-static.net/uploads/4470533/normal_603d99c5d4417.pdf
    • https://cdn-cms.f-static.net/uploads/4405904/normal_6026775221fba.pdf
    • https://static.s123-cdn-static.com/uploads/4461746/normal_5ff54f8f0c64b.pdf
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5fcae65759d4b.pdf
    • https://cdn-cms.f-static.net/uploads/4411228/normal_606781ef2e737.pdf
    • https://cdn-cms.f-static.net/uploads/4464524/normal_604bc093322c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bofamawetodo.pbworks.com/f/poe_dameron_x_wing_lego_blue_instructions.pdf
    • https://uploads.strikinglycdn.com/files/7e07736f-6858-4fa9-84a4-7326d06f8f82/streaming_film_journey_to_the_west_1996.pdf
    • http://buvavipoluvu.pbworks.com/f/a_raisin_in_the_sun_act_1_scene_2_comprehension_questions.pdf
    • http://juvudibip.pbworks.com/w/file/fetch/144582810/nenekeliwopikixipisel.pdf
    • http://favakiwosut.pbworks.com/f/visual_certexam_designer_crack_free_download.pdf
    • https://uploads.strikinglycdn.com/files/3c608e04-2060-4fd2-9321-1ec5eada4504/jopibulofafedemowesede.pdf
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144485058/oikos_of_the_olympians_items.pdf
    • http://bevajuvese.pbworks.com/f/kit_england_dream_league_soccer_2019.pdf
    • http://zobifel.pbworks.com/w/file/fetch/144651465/pufamutaxasuka.pdf
    • http://pexovobef.pbworks.com/w/file/fetch/144672525/interstellar_movie_hindi_dubbed_download_filmyzilla.pdf
    • http://feselikebapu.pbworks.com/f/medical_fitness_certificate_format_for_covid_19_download.pdf
    • https://uploads.strikinglycdn.com/files/4552e75c-ebd2-4bc1-9502-f1917c2b57bc/road_map_of_south_africa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d83a.bin
65b87dfbc886ae712ca583bb4e1e43d7836766664725946d37efd5455601ae1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 4948 bytes
font_01_sfnt_off0000e929.bin
1ab35a626d3f9e16d9c47968c1a0f90f129cffdfdf3505ddb07d635ea8b47221		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 10492 bytes

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