Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c48ec88ab4a809…

MALICIOUS

PDF

86.7 KB Created: 2021-09-23 05:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d5268d626e8319808e6f5ee1d2658fe7 SHA-1: e5a060c441feea32a793fda066cf3f612a050bb6 SHA-256: f7c48ec88ab4a8090d5837c6ffc95d6f769528299b10caf82f5ee0ab1f804669
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to unknown domains, suggesting a link farm or phishing attempt. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • 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 http://www.prakashirrigation.com/uploads/fck/files/84373922243.pdf In PDF document text
    • http://imdmotors.com/uploadfile/file/2021090501241617.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/tu88fgic4jgal5irc1ttdglp86/kowaxaxoxizabafo.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/jowodasi.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/texubemosowi.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/7374333965.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/tugagixunuperebamafil.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ed44ed3fb2b8c8a1bdfdb7308f392bff/vefubesodepaferusudup.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/59368216907.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/denojaril.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/sixusenob.pdfIn PDF document text
    • http://specialcats.nl/media/files/25699748666.pdfIn PDF document text
    • http://artcvajk.friendship-match.com/upload/files/20157564044.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/64435019330.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/butadivuwapiroro.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/27850186679.pdfIn PDF document text
    • http://mcutech.net/upload/2021/09/file/16306894821507507709.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/wizuvarugawume.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/zavewulivimagekidoritu.pdfIn PDF document text
    • http://gzxmbx.com/uploadfile/file/2021092004220873499.pdfIn PDF document text
    • https://scalper.ir/data/files/file/kusegujamimun.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/95705410353.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109100233160547.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/78280562504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=screen+sharing+pc+to+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001052a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052A 18240 bytes
SHA-256: 1de9e887f3abc068cebf65c0153c758680a6f1c7ec60bc3384ce842fe80fd49d
font_02_sfnt_off0001346f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346F 10824 bytes
SHA-256: 82770123957047158447d615fd79d27eb6a26df68d62e0a8382b9eda15c19ba2

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