Malicious PDF — malware analysis report

Static analysis result for SHA-256 927005ab250addeb…

MALICIOUS

PDF

81.4 KB Created: 2021-09-17 21:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4894c70906796ddda1a827f22f1b2bd0 SHA-1: 305f9b614a2d471c69a90707597cf8f3c512f23f SHA-256: 927005ab250addeb8b69daa6373c377dd73005e482af1202432cd8fc8b3bebfb
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Numerous external URLs are embedded, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and embedded URLs strongly suggest it's used as a lure, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://wastran.ru/uplcv?utm_term=windows+iso+10+64+bit PDF link annotation
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141749e8d311---60171771823.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/wupidopaki.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/92302316598.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/49165706487.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/27866977850.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/tazivodaw.pdfIn PDF document text
    • https://maviet.vn/upload/files/72396628815.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a3ab71a5c---voporezezukakediz.pdfIn PDF document text
    • http://speckrepej.com/upload/file/japuwavatafun.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/3613400742.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/40844374657.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/xipaket.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/fasirofiwomisibiba.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/dufekupusonisinuved.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/43594574535.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/414a316523ea0fa401fc4630a5dbbe5b/47802319659.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/zavovalamiwexolifazumuz.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/gadofuzo.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/43720288956.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/gajef.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/zebaloma.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161374bc97886e---99643574019.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347c6e94782---88118035594.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_off0000d3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 10440 bytes
SHA-256: bb3c1a6c50917f509d072bd1708e2fef56a1436d2ac06ab2ba1eb3bcea2a5e74
font_02_sfnt_off000103bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BC 19712 bytes
SHA-256: 7d8e25d37a0404816e9c5b844d6d72e329094cdbd42945b049406669a5878fe1

Open this report in the interactive analyzer, or submit your own file for analysis.