Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecabe368be496c96…

MALICIOUS

PDF

78.0 KB Created: 2021-08-11 20:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ee471c143345f7fce82c4601798255c2 SHA-1: dcdef2603165a7da151b0290aced96e19674f58f SHA-256: ecabe368be496c965f3bf0afb47bc08f35a7efab360c7ad2dcee83b9c0c19710
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, likely intended to distribute cracked software. The presence of external URIs and the nature of the links suggest an attempt to lure users to malicious download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://print-printonline.com/ckfinder/userfiles/files/vetikufezu.pdf In PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/5029f8aec78cde96f3d2ca2af4b21f24/78687980116.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/podagiwo.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/gasorivenazurawajexoriz.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/96373392054.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/aii1vqt31bmjh8ekcbrlk0mkej/bomijopivaxamuzu.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2efbc9dd0---15768937527.pdfIn PDF document text
    • https://laser123.com/geektic/files/ravevato.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/5392b6c9400a7b03731cd5a2fba5adc9/wiganuw.pdfIn PDF document text
    • http://cocoal.com/uploads/file/vasev.pdfIn PDF document text
    • https://landi-bg.com/images/file/91155768991.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/zomusujawopurimubeludule.pdfIn PDF document text
    • http://candientuvibra.com/images/file/42498538563.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/b7b006103c1c70822889fcf6c1237f39/40295845139.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/21743057074.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/37745012737.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210710_0A2FADAFEC7142ED.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090aa424c004---winor.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/78132004148.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfb06dd3c8---larimosoxezaxi.pdfIn PDF document text
    • http://www.puhito.hu/uploads/sudufomarifurovirur.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/51238267152.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/s28de9k3u7nurqdigfea4jfdk0/46210727374.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/89062749788.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/715d93278cf02b1fd93826c6c76dfbfd/26367301418.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d069a66b8---44021360279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=microsoft+office+professional+plus+2016+crack+file+downloadPDF 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_off0000cddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 11344 bytes
SHA-256: e2c07f2709692c0bef9ab468a698e1a80a58701209073332d3e7ec24c0f4ac42
font_02_sfnt_off000100f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 15412 bytes
SHA-256: 64610abf2385035bc657927cd84823fda1feb73647f6a3d7eb6f16f290c62c90