Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ddc38496e883dd…

MALICIOUS

PDF

95.3 KB Created: 2021-04-23 09:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fce0a8ff3b5566f6ef4c095398501376 SHA-1: bb736c9b99a8145ba61c51b5e26437bc7b9497df SHA-256: 20ddc38496e883ddfa81427da5b1abfd3d6eabd3c33bdf49d1a0bea985a7e44c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to a suspicious domain, disguised as a dehumidifier manual. The PDF structure and embedded content suggest an attempt to trick the user into visiting the malicious URL, likely for phishing or to download further malicious content.

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://botokaw.ru/strik?utm_term=frigidaire+ffad7033r1+70-pint+dehumidifier+manual PDF link annotation
    • https://cdn.sqhk.co/raxoxawupej/aiejhic/idle_inn_tycoon_double_room.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/dRu9CJe/kodi_lee_new_album.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/245b995d-d496-4ba2-9122-6d38d788cfa6/how_to_use_logitech_r400_laser_presentation_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/image_to_text_converter_app_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5988158a-7dd4-4056-ad06-775fcecef1a2/vidadel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbac84af-597a-45df-bdfb-eff653d39d2c/77349222764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42e597e-4a28-49ac-9f9c-ddf48798cc98/iso_9004_que_es.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324592bd-e9e8-48d1-a932-a27eabfa6131/2gig_go_control_reset_master_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4d36e8-8c0d-4787-a8d2-615388c28c03/best_way_to_cook_giordanos_frozen_pizza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e823a2f-90d0-459d-86f9-61d5a2517978/bushnell_tour_v2_slope_edition_rangefinder_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a2db5c3-b9e8-4775-abe5-f4a2f8f28b73/how_to_find_planet_fitness_membership_number.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/94693014710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c594318d-4e11-466d-ae43-de80c3fc2abf/what_is_mathematics_for_college_readiness.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/mizukivevegilodowotupopu.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/probability_sampling_dan_non_probability_sampling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bddfeaa-1ff7-47ac-afa5-8bb76d25fa70/difference_of_two_squares_worksheet_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67dc9503-d7f7-42d7-b121-43e990cc171b/strikemaster_mag_2000_ice_auger_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/sisezowelusujawodawinoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a373051-3f59-481a-8800-a9458cd85099/wusul.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/suwukekiwopabolugotubeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72699d5-3660-4cf4-b34b-c22fe581acc8/rakafunuvagap.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/57454753706.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001360b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360B 5704 bytes
SHA-256: ee76bf46a29ddbe0299cad919b1249a4c61249eaa95b15d22892a273cedaa8c2
font_01_sfnt_off0001495e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495E 11252 bytes
SHA-256: 6332ad07632ba0090ffdd6f4baf17c01d227f309267692bbd7325e804d545374

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