Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2592bdecf1dd44d…

MALICIOUS

PDF

91.1 KB Created: 2021-06-25 18:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e87d059f6c422b3d14dcc9704eca4363 SHA-1: f79970fc928d1944c5610bf8a49b82eda9353d8a SHA-256: c2592bdecf1dd44d33bb04083683a340e0744b9c04ad87051837f4886bc1debe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://medvor.ru/uplcv?utm_term=define+intersectional+feminism PDF link annotation
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/e18f1037572214f81fe72e2a13aacd7c/vuxabeku.pdfIn PDF document text
    • http://carolstoecker.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/42580295265.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/kurodumebusakezutajex.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ec7959f488c008784dfa4ac08de15e4c/getifipifesudazege.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430004644970586.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4636f3792045d096a429385553698077/7205594803.pdfIn PDF document text
    • http://palami.by/images/file/repegovedexawabo.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/23646318204.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c50ab9eeb7---bisidunilo.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/87646799422.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/85458794403.pdfIn PDF document text
    • https://clove7.com/userfiles/file/wuleteb.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/4gcahomutcdjj9asialvovevg1/18643948801.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f089q0264dplnulfsdm8qnpp64/50294662854.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/romunigebul.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a56a558c4---zekarezilexenibuk.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/7f84db1287d33e312543dc2fa741f9ef/89742102763.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/36b787da96532955eda6e8999919f10a/jatomekemuletoxakojo.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab14f1e6112---voxiraz.pdfIn PDF document text
    • https://combrooncom.com/contents//files/sebisaxikatudameronujuv.pdfIn PDF document text
    • https://led7.ru/file/bugimeguritefijupipol.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5086371cc---goxitiruvoropagejidolewi.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/16595350773.pdfIn PDF document text
    • https://stopserv.ru/files/file/40296862226.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/28611ce287e1c63d143d5e25c8d82fd9/laderosujinujokajuzatape.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/xomurikew.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_off00010202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10202 10496 bytes
SHA-256: 65976da1071431f9f3ab814cd067696ca5060987622fbecee13b84a3732e85dd
font_01_sfnt_off000119e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F6 17412 bytes
SHA-256: 08c5b5410640d417c140493fcd060fc4c3316b2640d23e23a486110d31a71012

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