Malicious PDF — malware analysis report

Static analysis result for SHA-256 edebb7cbc13ec6ba…

MALICIOUS

PDF

71.9 KB Created: 2021-04-08 07:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d71e5d604cd183b1b41ff54b418eb5dd SHA-1: 41a9c425990dc3aa66b9a0cf17a450852f359351 SHA-256: edebb7cbc13ec6ba5bcc499d997da7728ed3d01a641e092f0758011eb5c1a24b
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs, specifically 'https://fokemale.ru/123?utm_term=brown-+forman+annual+report', suggests the document is designed to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=brown-+forman+annual+report
    • http://teksalon.xyz/the_dark_element_anette_olzonbwhmh.pdf
    • https://cdn-cms.f-static.net/uploads/4426543/normal_605e1e3085b6c.pdf
    • https://cdn.sqhk.co/gixofusofago/JHlKhjN/86599255965.pdf
    • http://zhenskiizhurnal.ru/authors_purpose_anchor_chart_4th_grader4n03.pdf
    • https://cdn-cms.f-static.net/uploads/4401714/normal_60205510e9f39.pdf
    • http://kostlike.site/faferubogitalefobap70nic.pdf
    • http://healthit.space/how_to_override_canon_pixma_low_ink6ajgh.pdf
    • https://cdn-cms.f-static.net/uploads/4458833/normal_605df6e5cdacb.pdf
    • https://cdn-cms.f-static.net/uploads/4485818/normal_60170d46480f1.pdf
    • https://cdn-cms.f-static.net/uploads/4485698/normal_6009bcfc02b67.pdf
    • https://cdn.sqhk.co/tasiteregixo/o59ggnR/wu_tang_clan_winter_warz_instrumental.pdf
    • https://cdn.sqhk.co/fowonawex/kaRheft/distance_between_two_points_calculator_2d.pdf
    • http://drilltech.info/baldur_s_gate_enhanced_edition_android_apk0qf5j.pdf
    • https://cdn.sqhk.co/xuvisisitinu/aZWmPii/dodge_dart_rallye_turbo_horsepower.pdf
    • https://cdn.sqhk.co/vovigewuva/jdjiGge/mortal_kombat_10_brutality_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_e6c00b84dff84f849d97223ecac5f44c.pdf?index=true
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_5091b7d67721424dbf6f905946180e81.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ca052db2-7062-47cd-aa5d-90835feefd1f/gamepe.pdf
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_f8f6f96c0c3d4975bd6789a38598c28a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6dcb0d21-549f-4c4e-b9d2-4cf825408a39/how_to_change_the_time_on_my_g_shock_5522.pdf
    • https://uploads.strikinglycdn.com/files/8369c3c8-7b0e-4c90-a0c2-e124130aad73/python_for_kids_free.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_6b7bfda687df4958ae7757fb2cb425b3.pdf?index=true
    • 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_off0000dd94.bin
78607ebb5605f4dee0d11b7a175fad18206bc17d7f22bcf9766ffdc91e96977b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 5044 bytes
font_01_sfnt_off0000eec0.bin
b210070cb8a37279caedc8019f255be34b1e24fa02110f875d387eec6f7844f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 10340 bytes

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