Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadd0732e36ceb1e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-16 14:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a71f4033b57909b717b0e875411d0f50 SHA-1: 2c53dca461eded625c3ffb7c3c30ad8c932be348 SHA-256: fadd0732e36ceb1ec3016f40907df8df8531882304f11bb26e55b216f0e7034c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely to redirect users to phishing sites or download further malware. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://queure.ru/uplcv?utm_term=best+phone+at+the+rocket+launch+mini+game PDF link annotation
    • https://bya-ingenieria.com/ckfinder/userfiles/files/92148455924.pdfIn PDF document text
    • https://oferta.lt/i/File/jeralimijusujugetelejarut.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/94814911827.pdfIn PDF document text
    • https://etadelloro.it/images/file/burijel.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb0767ce7a---fegetifagorupijosawirawo.pdfIn PDF document text
    • https://auditorescr.com/ckfinder/userfiles/files/76749193898.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/xotigunolegosuxajewazi.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/93145058063.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/3f005eb1ac05c36127c75bb7698a4679/39231558852.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/posibiwovusuferajudonija.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/soriwu.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/matuv.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/fonomutodeworadabo.pdfIn PDF document text
    • http://www.xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/53900823600.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/72921159201.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/90251221830.pdfIn PDF document text
    • https://estoniapools.com/contents/files/loxamulu.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/6575839849.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/risokasotoxoz.pdfIn PDF document text
    • https://aneri12.eu/res/file/galeto.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/wogipofudadixo.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/wuxaralidonoxevusafe.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://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_off0000d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C2 11064 bytes
SHA-256: abe09de88665e0a66a8f32b6196cb9ea7d96a236a77b36fced5b81b2ac45f3dc
font_01_sfnt_off0000f061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF061 17352 bytes
SHA-256: 00261118099a60ada92a6fc05ee5fcc9b56b671df4c950aceae40ac4d0666079
font_02_sfnt_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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