Malicious PDF — malware analysis report

Static analysis result for SHA-256 2541a4bc572ecf2b…

MALICIOUS

PDF

75.8 KB Created: 2021-03-19 00:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aafc496eef91f33f733de4eab2683e3 SHA-1: 9420c9f4914a83d6ad1dd86e46c7e5725dd97894 SHA-256: 2541a4bc572ecf2beb645bd7c92ecc40ca28202d34d6315bbbfb3d168795bf62
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'druttle.ru', which is likely the malicious payload delivery URL. The document body, though heavily obfuscated, contains references to 'pogo cheats bingo' and the authoring application 'wkhtmltopdf', suggesting a lure to trick users into downloading something.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=pogo+cheats+bingo
    • https://cdn.sqhk.co/gonolesuzam/hagetjj/cnc_machine_operator_near_me.pdf
    • https://cdn.sqhk.co/xovepejegosi/ibUSjea/r-_type_dimensions_pc_descargar.pdf
    • http://dotuzodozo.22web.org/kitchenaid_food_processor_manual.pdf
    • https://cdn.sqhk.co/vilitemeru/hfl2rhe/ice_hockey_rink_measurements.pdf
    • http://umdtheatre.ru/actuaries_survival_guide5l55v.pdf
    • https://cdn.sqhk.co/xurunesijud/jhhhjgq/vimabudulekofugurade.pdf
    • https://cdn.sqhk.co/riwutosax/z86Ybgf/hocus_pocus_imdb_parents_guide.pdf
    • http://opros.xyz/jarekesofosajibenawaz5dx7e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a6a2fc46-c0e1-4b5c-956e-eab24922d12e/85402738356.pdf
    • https://s3.amazonaws.com/wusone/70987306806.pdf
    • https://s3.amazonaws.com/budovewesekaz/vilafakusexupel.pdf
    • https://s3.amazonaws.com/bogeguva/aparichit_2_film.pdf
    • https://uploads.strikinglycdn.com/files/83eb055a-9ee7-4689-8fb0-2e474bcb182a/78620399084.pdf
    • http://fepavipa.epizy.com/time_to_answer_amended_complaint_illinois.pdf
    • https://s3.amazonaws.com/nuxomigo/lipid_profile_nice_guidelines.pdf
    • https://s3.amazonaws.com/dagasopones/personal_balance_sheet_template_excel.pdf
    • https://s3.amazonaws.com/xonobijikivo/analytical_questions_and_answers_with_explanation.pdf
    • https://uploads.strikinglycdn.com/files/2464cada-7b0f-4938-9162-8bf3075ee581/how_to_address_envelope_ireland.pdf
    • https://uploads.strikinglycdn.com/files/bbcd9a50-61d6-468c-ad96-5af9d2f30cd9/sinners_in_the_hands_of_an_angry_god_literary_elements.pdf
    • https://uploads.strikinglycdn.com/files/ac8c4def-1659-477f-b15b-3e127199c4c0/50596545313.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_off0000ecc6.bin
ac8bc906d0da59d6b918a0c38b7178b484742b078509338e991a79ae0b46dfdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 5076 bytes
font_01_sfnt_off0000fe11.bin
7f0e994e8b35076464d1b1d8195b748f7a9b63f98b354359bb9f0c9e8e22be0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 10804 bytes

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