Malicious PDF — malware analysis report

Static analysis result for SHA-256 e250c95806391e19…

MALICIOUS

PDF

88.8 KB Created: 2021-08-05 07:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3f3c011d1de2913e98e1737f18cb0803 SHA-1: 42a99941f145288b34fda222d603879f6bf00e93 SHA-256: e250c95806391e19358bd20d9051c5db4bc5a36763123657c5bade9fe052b7fc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to lure users to download content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://perles-del-beya.com/userfiles/file/meridasufufar.pdf In PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/zumoxedijarizum.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b84af155633---55787364767.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/448f97e37057485b45574683cc527ce5/84477018963.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2885cab702---52230497900.pdfIn PDF document text
    • http://hawkins-kearney.com/clients/f/fa/fa1934e8f236f3272fb98c88546bd003/File/lofamojepenadufej.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/24e7a2c998130a18417437bde85bbae7/mezanavagivaxomataxude.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/maxewiretenekudodiv.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080748454b24---wisilagip.pdfIn PDF document text
    • http://vbs.pl/dat//file/limirimem.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/41423936857.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50cc571b70---rajujifapogudaporelukuw.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/98137309028.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/73363724162.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/zajuvozo.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/fakisaxobiwewukemobig.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b861038e69---rawurenakisoj.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/6cc6e6d113388c78bd90a55be57c0989/kuzuw.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/pevesofebifanu.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/3493301612.pdfIn PDF document text
    • http://castel.lu/userfiles/files/75957985749.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/4154670357.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/31008927686.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/55141880646.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=download+game+age+of+empires+3+full+version+offline+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_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 11168 bytes
SHA-256: 46fe354bf6724b33f929744d9d1e0ca0ea06031b39d86496fd052b4b6a931992
font_01_sfnt_off00010e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E79 17540 bytes
SHA-256: d9b793656ff572449b4befcf70dfc12c15c1ac1b1e15a66a99bb9d5929c00688
font_02_sfnt_off00013bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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