Malicious PDF — malware analysis report

Static analysis result for SHA-256 528b08c06c908a85…

MALICIOUS

PDF

88.2 KB Created: 2021-04-21 19:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4295de25e62eca1d20ac07ac741a5e04 SHA-1: ecc03957b373411dedb114b60b4bd6d4502c27ef SHA-256: 528b08c06c908a85f2026e570201c625c0a294c6bc147f865503a2b610dacab8
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://mezovuduw.ru/strik', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it is designed to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=craftsman+6+gallon+shop+vac+hose+size PDF link annotation
    • http://losusosemusisi.iblogger.org/nicomachean_ethics_cambridge.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/idTFCib/singapore_driving_license_probation_period.pdfIn PDF document text
    • https://cdn.sqhk.co/nunexijezep/igigpy2/powipudafagojaki.pdfIn PDF document text
    • https://cdn.sqhk.co/zotevokep/hN61hed/ps4_remote_play_dualshock_4_not_working_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vosizijanad/ijjb6jg/86244682112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/92775050896.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/medanuzemagu.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/kisakemidiwemiwuz.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/les_accords_toltques_livre.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/sumutepusenufagupudijekiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/bitumen_sheet_supplier_in_bangalore.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/the_expanse_season_5_episode_8_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03af0027-a395-4f39-8786-8c56960c4076/betitavafa.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/why_does_my_dish_hopper_keep_restarting.pdfIn PDF document text
    • http://vesoromu.epizy.com/bhagam_bhag_songs_bestwap.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/segubiper.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/assoluto_racing_mod_apk_2018.pdfIn PDF document text
    • http://rizinesuri.epizy.com/hs_mini_maxx_tuner_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/letters_of_complaint_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f83c5af-2546-44f3-9419-1867efe33082/xixib.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/citizen_eco_drive_titanium_sapphire_wr100_manual.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_off00011b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B18 5600 bytes
SHA-256: 6a8ec14f441741a90126f51af8b6cc083fe33e6af611df33b24e4ff453bf3d21
font_01_sfnt_off00012e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E09 10972 bytes
SHA-256: 964dde0b5a1a4d29bcf4c1d6145b77b9b2c5d988266a191e7f8d773b0a7e9803

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