Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c491def5b6be7e5…

MALICIOUS

PDF

95.0 KB Created: 2021-03-25 09:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 10604489306abab4299512db2a53debd SHA-1: 96a2dd5d1df20b09bdab128b309897acd9e46154 SHA-256: 0c491def5b6be7e5c931e963cd92225345ed0a02e4eb8e27e9f23033a8158e0a
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, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially as a first stage of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/award?keyword=english+story+for+reading+pdf PDF link annotation
    • https://cdn.sqhk.co/sepokafaru/ek1sNmf/centurylink_business_email_support.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/ihBge7X/deer_hunter_classic_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/c8CE9Vl/fishing_age_fishing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/gK3oGhZ/83882447860.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5ffc368ea47f1.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/ijhfjcS/crypto_hardware_wallet_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/ii9l3YC/jungle_snake_io_worms_zone_2020_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tinajugezepi/iccgedC/fast_racing_car_3d_simulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/jdkjejj/senukobemosexa.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/jighgeD/14555695600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409811/normal_5fcf39fb62efa.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/fjiRgie/birthday_cake_ideas_for_toddler_girl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472186/normal_5fcdb30bd2433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_6035cdba2bad6.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/igsgehi/kupoweferitudamajij.pdfIn PDF document text
    • https://cdn.sqhk.co/fefavezevir/c7ji3ge/23943741840.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/d9a39814-0929-48e0-bfa7-750c4463a57c/8372079448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38ca95af-4eda-4973-b60d-62fe35112c36/the_vegetarian_han_kang_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30809ecc-e12d-4815-90d6-bf5d4e242e82/is_kitchenaid_a_good_fridge_brand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484abf08-e40a-40e8-8e88-a28124eeb7aa/bosch_1617evspk_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3037d980-a7d1-4bc6-b33f-8d1dbcee5257/metal_gear_solid_2_substance_ps2_unboxing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a60974f-605a-4874-9c4c-48367dfd048e/ipod_nano_2nd_generation_reset_to_factory_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21624fe-0589-42ec-87ee-d9891fb2b13c/55618800256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65897488-9017-4945-a844-cfa812f06218/dark_souls_prepare_to_die_edition_save_editor_pc_ps4_controller.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_off000137a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A0 5364 bytes
SHA-256: 0b08b72b2e9da2c0a81f7d46ad5726a2de3b9f1a9c368f4dfa6be6663392802e
font_01_sfnt_off000149e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149E4 10684 bytes
SHA-256: 4faaef5824f7a4cad5de1cac822fdc285d7cb0399f7bc9a1a55b98fd9c97c325

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