Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f32dd6a66ae048a…

MALICIOUS

PDF

77.6 KB Created: 2021-02-28 14:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c3205f9d9409c4201a30960591e337d8 SHA-1: 04d55b5e57b89875daea0cf846377498c8946e63 SHA-256: 4f32dd6a66ae048a5982516da3c1ea47faa9c8b320b919f3edbdfe0143a7fba1
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for further exploitation.

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://fokemale.ru/strik?utm_term=how+to+tell+when+my+remington+700+was+made PDF link annotation
    • https://cdn.sqhk.co/xiditado/JgcSZRv/70958927296.pdfIn PDF document text
    • https://pumavamevimi.weebly.com/uploads/1/3/5/3/135391045/bikirubuloj.pdfIn PDF document text
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/vijemowiperufi.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/iingfjf/box_office_movies_2020_dstv.pdfIn PDF document text
    • https://butabefuje.weebly.com/uploads/1/3/1/4/131437434/4736974.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/how_to_program_a_universal_remote_without_instructions.pdfIn PDF document text
    • http://kinorio5.xyz/19526880127bn7q1.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/indian_law_books_malayalam.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/iksar_hide_boots_p99.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/timipawaj.pdfIn PDF document text
    • http://fastdonwload.space/atem_switcher_pricezwcmw.pdfIn PDF document text
    • https://cdn.sqhk.co/jogibigeda/jPxRMGL/petijapowimexaziguguzil.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/tumuzu/65318968392.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/berechnung_reaktionsweg_faustformel.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/mukiwexijigiwanowozefureb.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/11991552620.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/active_directory_training.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/15321072809.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/breaking_dawn_part_2_overture_sheet_music.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_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 5616 bytes
SHA-256: 4a488051ab49413feec245da13ebcfc30bb174f8449d7211da6e99c4250861fb
font_01_sfnt_off00010440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10440 10768 bytes
SHA-256: fa846a3e436366bbf4e61aa3da2dbd579df9d6d797536cbc57f3359217cdee65

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