Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b0ae8a5b1a05f7…

MALICIOUS

PDF

71.3 KB Created: 2021-03-02 21:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 31546f5fe0e282f5b546da4440db760b SHA-1: c6223171534f741865bdf853715e4ad98460a3e9 SHA-256: 92b0ae8a5b1a05f7e2f2761bd7ffb918c6dcaf795177523922a0f6b3e62476d0
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a social engineering attack, specifically a 'ClickFix' lure and a payment redirection lure. The document body, though truncated and obfuscated, mentions 'Windows 10 pro keyboard shortcuts not working', aligning with the SE_CLICKFIX heuristic. The presence of numerous external URIs, many on disposable hosting, suggests a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://botokaw.ru/strik?utm_term=windows+10+pro+keyboard+shortcuts+not+working PDF link annotation
    • http://dawexefif.getenjoyment.net/norezitukomi.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/nowogopamaselipulexaro.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/vVovgh2/35189943165.pdfIn PDF document text
    • http://kevebofuru.medianewsonline.com/exide_battery_charger_repair_parts.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/boy_scout_handbook_hardcover.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/tijowo.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/ion_max_lp_usb_turntable_with_integrated_speakers_review.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/iasgeX8/download_game_frontline_fury_grand_shooter_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/bzBhdvt/hocus_pocus_quotes_amuck.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/37506510167.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/dufekifaral/17183297930.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/49337446201.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/first_solar_series_4_spec_sheet.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/how_to_play_harlequins_kill_team.pdfIn PDF document text
    • http://sosejelufati.epizy.com/jotekisoxididiw.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_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 5908 bytes
SHA-256: a37397a59c7eeb5b3b1d9cf7e66a35d57350c9036da98cc87ff7120fbd4b1fef
font_01_sfnt_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 9972 bytes
SHA-256: f2f7ad00566d2a901e7f0b30e151c671d4e6115e9e4bff9c81a6dda8bd925377

Open this report in the interactive analyzer, or submit your own file for analysis.