Malicious PDF — malware analysis report

Static analysis result for SHA-256 0317e2167f27c766…

MALICIOUS

PDF

93.0 KB Created: 2021-09-17 04:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 15d46aa34e52c9545bb0f0067d0d1ed0 SHA-1: 48f354b50c10b23a7a9dc4ae26fe3917ce822fdd SHA-256: 0317e2167f27c766ee7c7111d46c522fc02157f22825b33466f143462f6010c4
156 Risk Score

Malware Insights

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

This PDF sample was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful destinations, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://prana.video/wp-content/plugins/super-forms/uploads/php/files/97vlkdkphrbobl74njme7k1esj/49939878490.pdf In PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613624a83dbed---86974985650.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/140120464863.pdfIn PDF document text
    • http://napiarsaigh.com/images/wuguwoxaviruf.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423778c8235---zajixewam.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/89763261698.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/kesomutogulidiruxukudoxo.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/rajinigabigakedajutoju.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mepew.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/21267903687.pdfIn PDF document text
    • http://orthopediedelft.eu/files/kolen.pdfIn PDF document text
    • https://advik.net/userfiles/file/75972934494.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/85475562569.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/3002910913.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/33550694106.pdfIn PDF document text
    • http://yuha.be/_files/file/vurojikipinosineb.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/54067755846.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/tifujaletogajisekena.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/19937336264.pdfIn PDF document text
    • http://asid.rw/userfiles/file/92525135899.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/73987079824.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612eac6b3ba34---digufisigu.pdfIn PDF document text
    • https://signika.pl/Upload/file/bedofatexo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=lg+g3+stock+romPDF 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_off00010bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC5 10260 bytes
SHA-256: 1c6dae800c4dc450a1f889476ce9bed7c451b2f2e6439d8855d28456ee09c9bc
font_01_sfnt_off000122f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 17092 bytes
SHA-256: 46a613581d28ace7644cd81dd9a7a2e13ea1e612c443ca9f5130862648edf42d