Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d094f0208436de3…

MALICIOUS

PDF

89.4 KB Created: 2021-07-20 12:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 113738d4003ad6e6d86133f95085d43d SHA-1: 9ac9b4fe59cdb19d135a99acc5750099368dfba6 SHA-256: 3d094f0208436de325bad9f971f605402171f0c37f14e8ae2e06cc5b775929cb
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, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing. No scripts were extracted, but the structure suggests it's designed to redirect users to external, potentially harmful, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/eb4441925fe0c3cb5355512f79dab3ad/44803840217.pdf In PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e05b70ce73b---xubapiguvunuvusegoro.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8f87497da---folazibane.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/vigowupa.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/8938410a15c43c0970dbc97e2fa40978/sepik.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f12bdb44---78190539614.pdfIn PDF document text
    • http://xn--xhq021fvrwdth.com/d/files/bukexizelasuwaseze.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b837450c96---99032041456.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/bojujovomapivepasamasot.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/5363629872.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eadbf6e77c---575704670.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/mejokiresuvero.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/19g9f7o0g550og5qjidqvqu7i3/21734620518.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160930088cd96f---jakojelasebunus.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/vumukuso.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/24396669473.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/xuged.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/86192208358.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/94ff44d8833ed73043324e655e69b8bd/82889230990.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/20049354553.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b894665950d---jafasulapekuj.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/89383681639.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16072f2676583f---saxofiba.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/mizelapefum.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a69f013c32---kutifenamoripalagugowamon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=do+you+need+a+comma+before+speech+marksPDF 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_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 11096 bytes
SHA-256: 872a577c8c717fd8012c989d49d91e13536977ee36bbf2e919a9fb0825e1d373
font_02_sfnt_off00012ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD2 17468 bytes
SHA-256: e0f58887d90bd107e8af03306aee7bbc486727ceff29fd8e4101c66b53ce0c0f