Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8421f1b3582fd0d…

MALICIOUS

PDF

76.2 KB Created: 2021-05-12 04:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdf164784224e4fe038f266ec13268b8 SHA-1: e311182fa551eec2c92e766f186775225b3d96e9 SHA-256: e8421f1b3582fd0d638227c877dad188470784dfb831a7ad799afda93f446c10
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to trick users into navigating to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=how+tall+and+wide+is+a+55+inch+tv
    • https://cdn-cms.f-static.net/uploads/4451227/normal_601143000fc56.pdf
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5ff323e1d02b4.pdf
    • http://gogotmif.space/gta_vice_city_liberty_city_stories_mod_apkcfxm1.pdf
    • http://instacopyrightcenter.com/garmin_vivofit_jr_2_waterproof8t942.pdf
    • http://metryck.info/how_long_to_play_curse_of_strahd8z64e.pdf
    • http://tuderoba.getenjoyment.net/amenaza_parto_pretermino_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4499635/normal_6029d236da4cd.pdf
    • http://ehaberdevlet.com/355707608758q12j.pdf
    • http://bionatur.space/french_grammar_exercises_class_9pwkf4.pdf
    • http://fukazab.mywebcommunity.org/ruhs_bsc_nursing_entrance_exam_previous_year_question_papers.pdf
    • http://white-x.fun/raselogakisetepubabae98z1.pdf
    • http://tozofuji.scienceontheweb.net/16084552610.pdf
    • http://salonhq.xyz/86193015179qnjau.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wewuxuviwar/algebra_worksheets_maths_aids.pdf
    • https://70745723-7f4a-4dc7-98be-95bdce43cd82.filesusr.com/ugd/67bae7_18e4ef22f8fa433cb75d00ca36a0eebe.pdf?index=true
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_ef19f02724dc4c20b50540cb6c6f88ee.pdf?index=true
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_878af628c961430bb94fad533f947378.pdf?index=true
    • https://s3.amazonaws.com/tinezedu/9258844944.pdf
    • https://s3.amazonaws.com/dobikasukavu/77286254051.pdf
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_d0a5ab2b009840ddb15ac67184638cca.pdf?index=true
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_525930d8936f4d5cb305f191aebb117f.pdf?index=true
    • 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_off0000ebf4.bin
2d30fbca1decacede0142e4fd0c475b524ad3712545c3a8481c864539b457c40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 5168 bytes
font_01_sfnt_off0000fda1.bin
613094923717bb9f0b1f25e16d6c7e2c8345700e79c59ca2449851bae514074b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 11192 bytes

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