Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d82dc7e840afafd…

MALICIOUS

PDF

103.6 KB Created: 2021-03-10 19:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7365b9314b1dd440bf4908b8ce4d716b SHA-1: 7f4e165dc63e72fe497ea63f3272f3d74fc5cb03 SHA-256: 4d82dc7e840afafd0f88ae56ec4c6bb3f9ed7baea5587c07597d62e312a08c2e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'ponafet.ru', which is suspicious and likely used for phishing or to serve a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a questionnaire, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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/award?keyword=emotional+intelligence+appraisal+questionnaire+pdf
    • https://cdn.sqhk.co/nafadurip/7gigh75/thrift_savings_plan_tsp_login.pdf
    • http://kunewalijaxuna.getenjoyment.net/goxekeve.pdf
    • https://cdn.sqhk.co/ribobujir/4HCgOid/68257486143.pdf
    • https://cdn.sqhk.co/tedogegez/ihFTSjh/give_way_traffic_sign_meaning.pdf
    • https://cdn.sqhk.co/woxemumi/wuJSjb4/90874775025.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/gimufesajo/how_to_read_a_comic_in_deadpools_room.pdf
    • https://uploads.strikinglycdn.com/files/0304957d-38f0-46d0-b32a-27fe121ef797/dungeons_and_dragons_5th_edition_character_sheet_microsoft_word.pdf
    • https://s3.amazonaws.com/zozuxukoxo/how_to_pair_a_plantronics_plt_bluetooth.pdf
    • https://s3.amazonaws.com/jawusawar/bengal_tiger_movie_tamil_songs.pdf
    • https://s3.amazonaws.com/bomifabipi/how_to_listen_to_the_highest_quality_music.pdf
    • https://s3.amazonaws.com/gupojakami/adestramento_positivo.pdf
    • https://uploads.strikinglycdn.com/files/213daf66-82cb-432c-9971-2e8572ba2899/will_turtle_beach_stealth_600_work_on_ps5.pdf
    • https://s3.amazonaws.com/fasomusogapovi/bushnell_tour_v3_manual_meters_to_yards.pdf
    • http://liraperuwuw.atwebpages.com/relokufosozisetomorijuwa.pdf
    • https://uploads.strikinglycdn.com/files/dd3293ee-1f45-4a38-a887-1e2eaa964067/music_theory_for_guitar.pdf
    • https://s3.amazonaws.com/titugome/1176931923.pdf
    • https://s3.amazonaws.com/sezewu/agamennone_eschilo_testo_greco.pdf
    • https://s3.amazonaws.com/bogijexu/debubil.pdf
    • http://ladurabazidema.onlinewebshop.net/89366542985.pdf
    • https://uploads.strikinglycdn.com/files/c9b1e816-ddae-4ff3-ba1f-87180169f00e/what_eastern_philosophy.pdf
    • http://jisijuvod.myartsonline.com/26836218239.pdf
    • https://s3.amazonaws.com/ganubatebedoxez/what_animals_need_humans_to_survive.pdf
    • https://s3.amazonaws.com/wazagidonux/97296627884.pdf
    • https://s3.amazonaws.com/sinadi/currency_conversion_in_excel_sheet.pdf
    • https://s3.amazonaws.com/vavabi/bmw_e46_manual_transmission_oil_capacity.pdf
    • https://uploads.strikinglycdn.com/files/38ac7f56-1e60-4138-b371-90ba3f8ecf36/is_walmart_still_open_24_hours_a_day.pdf
    • https://s3.amazonaws.com/latufenaw/fitotulenujopuzipogudexo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014281.bin
e95b0e7b6b70273b3ab2214e84ced70d362af36786bc45d4d3971426054e6181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 5440 bytes
font_01_sfnt_off000154dc.bin
17e5addcf76c0fa4c4c9ae8703373d42d94c48cccf63ac6c788bb250768c10e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154DC 13524 bytes
font_02_sfnt_off00018041.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18041 4324 bytes

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