Malicious PDF — malware analysis report

Static analysis result for SHA-256 25faf42240c5c8b4…

MALICIOUS

PDF

99.5 KB Created: 2021-07-03 03:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: aa1f44ef8a1527813b7a6ad27ad4642b SHA-1: a858dd2c83e9d1ba6625999e2362f92efbc684ef SHA-256: 25faf42240c5c8b43882dae0e2ee2f965a165f12f3a1916eadef53f6b08d7f8c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external URIs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to potentially malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://krisoc.ru/uplcv?utm_term=simple+present+interactive+games PDF link annotation
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/af0oiqb789opgn5db583745aqs/sulowubuzozupid.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/vekutusasosojinorabosoja.pdfIn PDF document text
    • http://195exim.com/datas/files/vosexupujazutusamurep.pdfIn PDF document text
    • http://anysoldierfundraiser.com/clients/a/af/af293656121fcb8b60a8c910089dd81c/File/nerigusorefibobonufum.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/josobulut.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/46745973850.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/79lejqcrpmu9as628d349ns0sq/dalufiwubobuxukanumew.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0822242e7c---komasemivosuxut.pdfIn PDF document text
    • http://benrassam.com/uploads/files/61822953172.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/ff9d203cfdab38c26568e2dd5e2ea8e0/golatopogugijuzogixa.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c4346161---vabeme.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ef2f6497e---51141830286.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/tonipupaxuwurepiwilaw.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/78v3ifr2nc5bh19v4kivrohkld/90105188133.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/widukemaludupufi.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/022a4539e7227d9b26583e77619507c0/bavizomemexizixalirugugop.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/76516478194.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/fidovojipudipa.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900709aa0c7---nefipixefa.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/dndgv82th4stdtfpmdmhplqckd/94146306008.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/badolinodizi.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821ca146c66---vatakowegopod.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5a5a991c3ae214ff378a9cd255f69150/mukiturukosil.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_off000124f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D04 16544 bytes
SHA-256: 08c82e585f3213a011da8711f1511899d6bb3921063668e59ca6c492ded11c5b
font_02_sfnt_off00016801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16801 10740 bytes
SHA-256: 750df89816c45c5e21c41d507bc057d1faa946c97558b56d0c72695dda7014f0

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