Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc6d6dae105168a…

MALICIOUS

PDF

75.4 KB Created: 2021-03-07 21:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f7d36a81f4142a0a04927f97635e4baf SHA-1: bd666b8d4e513a9857ebd9ed638ee6a637a842dd SHA-256: bcc6d6dae105168a84c6edd5eb521d2e02b417b07a038cb50edbd489579d8b88
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV. It contains multiple embedded URLs, one of which, 'https://vilenefex.ru/award?keyword=how+has+graphic+design+impacted+society', is flagged as suspicious and likely serves as a lure to a malicious site. The PDF structure and embedded content suggest it's designed to exploit users through deceptive means, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/award?keyword=how+has+graphic+design+impacted+society PDF link annotation
    • https://cdn.sqhk.co/putuziboki/Ljdhdjh/power_hover_cruise_hack_apk.pdfIn PDF document text
    • http://copyright-services-us.com/wigemd1p7o.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/jagdfge/42487063238.pdfIn PDF document text
    • http://1eyvgo.xyz/nididedoton9bbu.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/how_to_get_fl_studio_cheaper.pdfIn PDF document text
    • http://instofficial.online/wolonasegupulijigiqcne0.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/simujix/troy_bilt_tb22_trimmer_head_removal.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/expressions_and_equations_6th_grade_worksheets.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_07bd102371734199b80948be7c318425.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_4da53d274ba84b64ae84e2faafc20342.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b87ff2a-2f30-42a1-9798-2d7acb5ef392/white_christmas_song_covers.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/vozose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7539e74a-2fc2-4835-ac58-2473e8ab94e1/minidalosenativonid.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/18094830271.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/stanley_1200a_peak_jump_starter_power_station_w_500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeab549b-f931-4075-8f9b-75af6fa43551/how_to_read_surah_al_mulk.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_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 5608 bytes
SHA-256: b065fab22b8f7757033d25fcfe56293b1a8f4cdeafb85d3d4c23527665764bce
font_01_sfnt_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 10132 bytes
SHA-256: 0c4f320fd73be70f008a5edcb2558c4099441567b6457c5cf39e60cba90259e0

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