Malicious PDF — malware analysis report

Static analysis result for SHA-256 1779c0046eaa7b5e…

MALICIOUS

PDF

94.5 KB Created: 2021-07-04 09:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 441da3c4af6ebfe52b98eff3d50cfc9d SHA-1: babe8f6a50ed01db4a4180eda8093da21f697f99 SHA-256: 1779c0046eaa7b5efb5c84ba8a197d904dca6cf7bd4cee7737be422b74fd5e87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. While no scripts were explicitly extracted, the presence of PDF_URI and embedded URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://irlanc.ru/uplcv?utm_term=what+is+the+chinese+new+year+animal+for+2016 PDF link annotation
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/71b9b69adbada9016315c7f27446293d/zarubinejakedosefawe.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/kidabuwetodupijan.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/sapoxalux.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781c74bef37---dorixaxarazotosix.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e057088e559---fanusapugenewodutiwubu.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9d1be1a84---tulemeradowaxonubuve.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e921b3cc1b---kigewi.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/63331033866.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/91712948815.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804dbbab0da---13321483424.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/c1a6aa808364746c3acebd9f3424e18f/70257838404.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/s2u8l3ls3v25m3co1brjbe17kf/65911068712.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/55567549911.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06dd6dee86---xalolovenikorudusidok.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f6ebd867c400a4f4e405f8285d81cb7d/vovivodedekizu.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ieh1eomoghef1csjaaeujnvadp/viguvivokufofu.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d766bf88915cbef088377c58390b2daf/zoropafijem.pdfIn PDF document text
    • http://sparkpro.lv/content/file/duwuzexizezogirarisakod.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b038948f38---27876439986.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836dbf14dc3---noragiwidopuregavelu.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2d2251b5f7ec1ae73bea639d5cd2d12d/vozar.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/qcdtln69i4g8rae3tafli9gftb/1179782138.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/sarerata.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/29663297586.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bfd0634d6---48926065261.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E5 4736 bytes
SHA-256: 8ca3bda303681d8104c5bb86f11942f27007464a90c807ad60bd8a0f8c92be4d
font_01_sfnt_off000109ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BA 18716 bytes
SHA-256: c66e3da1d47ca9c33334eeff8e72aed81494b9e492713974b1e3d4eca0e0f704
font_02_sfnt_off000137a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBF 11256 bytes
SHA-256: 433e9893f2edfe3f1eb9a56301ff56a8312dce48465218dad9552f770c18c685

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