Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4c9f4b970d61e6…

MALICIOUS

PDF

69.7 KB Created: 2021-04-02 17:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c27f5eb829bd2e4d00c7e7b424e30a SHA-1: 7c2936e63e0aa180d0b4468692715a04082d8161 SHA-256: ae4c9f4b970d61e65653183f56ea1c28c4ea159a48c581270eb92869b0fb4d6c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. The embedded URL likely serves as a lure to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=biology+chapter+7+study+guide+answer+key+pdf
    • https://cdn.sqhk.co/vitimosugu/bAgeMij/jijofagom.pdf
    • https://cdn.sqhk.co/barosevarega/oTjZBpq/49442065895.pdf
    • https://cdn.sqhk.co/tukawezezo/d3wgcih/business_management_chapter_7_quizlet.pdf
    • http://lamakexo.scienceontheweb.net/present_past_future_continuous_tense_exercises_with_answers.pdf
    • https://cdn.sqhk.co/runetonorox/hend2k4/free_robux_hack_codes_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4382193/normal_602881a3cd591.pdf
    • https://cdn.sqhk.co/baruduwege/f9OEshf/65443434373.pdf
    • https://cdn-cms.f-static.net/uploads/4476011/normal_5fda8b0c7522f.pdf
    • https://static.s123-cdn-static.com/uploads/4458388/normal_5fe22ac81dc17.pdf
    • http://febisulel.22web.org/synonyms_and_antonyms_worksheet_for_8th_grade.pdf
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63cfd63e1c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sorotakadu.rf.gd/pukakikof.pdf
    • https://s3.amazonaws.com/lokijuronig/21187478448.pdf
    • https://uploads.strikinglycdn.com/files/5d29afb5-d3a7-4c2c-a9a2-5e133c92d637/los_tres_tipos_de_ecuaciones_exponenciales.pdf
    • https://s3.amazonaws.com/wurivuve/12644763807.pdf
    • https://s3.amazonaws.com/takebemanijewok/25338686519.pdf
    • http://wazipegemezen.atwebpages.com/free_to_word_converter_mac_os_x.pdf
    • https://uploads.strikinglycdn.com/files/a7432c61-454c-407e-bc2e-f64f0dc4945d/19889870097.pdf
    • http://putiweg.epizy.com/35417237229.pdf
    • https://uploads.strikinglycdn.com/files/70a4facc-ee78-4a63-9934-06a35a85900a/cen_tech_multimeter_continuity_test.pdf
    • http://kubosew.epizy.com/47609830607.pdf
    • https://uploads.strikinglycdn.com/files/16f9acc2-ba80-46b7-93cc-4251f6d2fb33/how_to_program_universal_remote_to_sony_blu_ray_player.pdf
    • https://uploads.strikinglycdn.com/files/266aa3dd-c7c6-48b0-8922-9f69e0843dd3/ti_nspire_student_software.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_off0000d1e4.bin
1a1244519ca72b0f4ad4fa76cf8b638ccbb3720dd31117a3a7fc9cb0e96c62fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E4 5804 bytes
font_01_sfnt_off0000e5c9.bin
538d1b67f03fffa786e9272e0d0956c1ce01c5cc3d675c5436b4e250c8bd9c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 10348 bytes

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