Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d15ac179e6d641a…

MALICIOUS

PDF

98.5 KB Created: 2021-03-12 22:00:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97bb172f024a2db64b8ac25fb74cc5c6 SHA-1: 2bddadd676d80e13a2af8e7c476fe7f1c85557fd SHA-256: 9d15ac179e6d641a3c90fa6dccbaf4001acdda024c34c638187f9cf94000ffc0
136 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's an advance-fee scam lure. The document body, though heavily obfuscated, suggests a theme related to 'steampunk rpg pdf'. The presence of external URIs, particularly those with unknown reputations, points towards a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself is leveraged for malicious purposes.

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://baarspo.ru/award?keyword=steampunk+rpg+pdf
    • https://cdn.sqhk.co/jefapukawore/hcSb9ax/jigusukituw.pdf
    • https://cdn.sqhk.co/litalile/hgjsEDX/mynba2k20_app_head_scan.pdf
    • http://nofuwev.iblogger.org/davabewutu.pdf
    • http://penageli.getenjoyment.net/74341013162.pdf
    • http://bigonetudukori.iblogger.org/how_much_do_a_basic_car_alarm_cost.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fibesezati/computer_jargon_word_whizzle_answers.pdf
    • http://roteniju.rf.gd/42367052697.pdf
    • https://s3.amazonaws.com/nowokil/3d_to_step_file.pdf
    • https://uploads.strikinglycdn.com/files/c63daec9-5644-4be1-8d12-d23db3ea310f/94683547343.pdf
    • https://uploads.strikinglycdn.com/files/78f5d428-bd70-4e36-b946-d55fa62bcf5b/73841094707.pdf
    • https://s3.amazonaws.com/tikoweravisixu/the_taming_of_the_shrew_summary.pdf
    • http://podugidak.epizy.com/step_up_down_voltage_converter_transformer.pdf
    • https://uploads.strikinglycdn.com/files/37a6bbb4-e861-47b8-a1a5-1187528c830c/spiritual_meaning_of_seeing_607.pdf
    • https://s3.amazonaws.com/tutapaxi/symbols_in_the_mandalorian.pdf
    • https://s3.amazonaws.com/nezanurugega/lo_and_behold_movie.pdf
    • https://s3.amazonaws.com/wamatasamegu/cercle_de_la_forme_78_rue_lecourbe.pdf
    • https://s3.amazonaws.com/tokatefozude/67774271146.pdf
    • https://uploads.strikinglycdn.com/files/d236bbc2-751e-4ffb-a245-a2a8981fde75/mabikejalenopajepid.pdf
    • https://uploads.strikinglycdn.com/files/b9e67286-7efd-46be-bb9f-4edd00994f55/4278089050.pdf
    • http://sebokegekesuded.atwebpages.com/linux_system_admin_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/moduxanakuri/93_toyota_pickup_frame_replacement.pdf
    • http://fefadipif.rf.gd/android_always_on_display_oneplus.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_off000147ba.bin
8103bbad718b3a4cf555a268661200ebf4e2c7e2eb4b656ceda4b4cdca487a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147BA 5320 bytes
font_01_sfnt_off000159c1.bin
959eb5380c80312b46d5bf45b96801816b55e3b9e45dabf7243883812a606e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159C1 10244 bytes

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