Malicious PDF — malware analysis report

Static analysis result for SHA-256 0914f3ee7f9129e3…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 06:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b702fd497c42df5b44143315046b88d0 SHA-1: 783187e2756a21135f4835efc089c255f2d78806 SHA-256: 0914f3ee7f9129e38ff382cf6fd8629e70467849c4a106af93b435455e872348
96 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs pointing to external PDF files, suggesting it's part of a phishing campaign or a downloader for further malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, indicating the file's intent to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=adding+subtracting+multiplying+vectors+worksheet
    • https://cdn.sqhk.co/mevojazix/ggjfprc/40450061921.pdf
    • https://cdn.sqhk.co/zexetiminav/Rhh4ij1/17784677339.pdf
    • https://cdn.sqhk.co/domuzusud/hhZhfib/free_childcare_application_forms.pdf
    • http://tusiteguluvora.getenjoyment.net/zumemagaxexemarunob.pdf
    • https://cdn.sqhk.co/kagelemovo/jfDje84/80451425764.pdf
    • http://gimunota.iblogger.org/56168911924.pdf
    • http://nomokesus.sportsontheweb.net/arbitration_act_2020_nepal.pdf
    • https://cdn.sqhk.co/daxerarugak/bgeiiif/45887707590.pdf
    • http://gufurebu.medianewsonline.com/learning_radiology_cases_of_the_week.pdf
    • https://cdn.sqhk.co/fokofike/cjgjbia/pupeta.pdf
    • http://finomimetafix.sportsontheweb.net/zoxulesegosanivoduvalop.pdf
    • https://cdn.sqhk.co/konarolikomu/aheghhc/vlc_4k_video_player_for_windows_10.pdf
    • http://zebozewazogaso.scienceontheweb.net/gomebugasotusabogota.pdf
    • https://cdn.sqhk.co/tonukabonuwe/tijjQgd/immediate_resignation_letter_template_uk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gafodix.myartsonline.com/bazeb.pdf
    • http://gefaribabati.rf.gd/how_to_cancel_a_vendors_license_in_ohio.pdf
    • http://xuwozir.rf.gd/jofarogikenotogop.pdf
    • https://uploads.strikinglycdn.com/files/37851ffa-7151-4ca9-95ae-281b4728a5a8/nes_roms_super_mario_bros_2_japan.pdf
    • http://vigavanoxe.onlinewebshop.net/can_death_be_reversed.pdf
    • https://uploads.strikinglycdn.com/files/5a6ed7bf-59ab-4669-a314-c85f70861f11/party_music_playlist_clean.pdf
    • https://uploads.strikinglycdn.com/files/259f33bd-b236-4c5b-948f-2eb37b662ed3/temoxozosizok.pdf
    • https://uploads.strikinglycdn.com/files/0b836721-9eef-4a90-af74-f3f7a063015e/how_to_measure_visual_analog_scale.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_off0000f0e9.bin
2fe9e8515c2e67c05f0ea7da2ba07ce6532a61a5e7b3692fa638f67cb48bacf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 5932 bytes
font_01_sfnt_off00010509.bin
cd4f3def43732ce59688a796405b69c68a4879c848724fa576e64cc0af1cfc4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 10844 bytes

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