Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b42c93399cf8866…

MALICIOUS

PDF

67.9 KB Created: 2021-09-01 06:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aec6344b81b27a85ade918ccb8853929 SHA-1: e4f9f285ed55a4cb3d2a81bae968cd8957b005ed SHA-256: 0b42c93399cf8866c32f90de5096a2fc175a907aab84b03b9258c860e031868c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm on potentially disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6177

Heuristics 5

  • 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
  • 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 http://aylincinarli.com/fckfiles/file/16873862749.pdf In PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/97624321805.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/davokuwod.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/dagujawes.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/pa0em7b7336tgrp82v91t54172/xegunuviripivesa.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c947be61e98---wodomevudanokawajavomidu.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/wigifofofikimafarolizi.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bed8e60c5---pagariwirubedonid.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c31b5202e11---23179736542.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/63789281597.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/wixogolasireberexe.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/46c2077bf33b8907d0e84cf79822b4a0/kuzimavubavuziwak.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087316438664---bowixawaginanafopomojite.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/30a489be452cce453b0d4259ca274a46/12022304731.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/95405899302.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/30353963893.pdfIn PDF document text
    • http://elm3rad.com/file/wegadobavowixifuxufezemo.pdfIn PDF document text
    • http://tcihk.com/userfiles/84024556270.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/dktr0l7tgo4aa54s621c7imks4/pajaludodagedujodunexe.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a88d497374f---sepawixanotaba.pdfIn PDF document text
    • https://kildevangen.dk/files/55722174721.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/bafezozunifefaxez.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/2f67fc42894ccddb9276fb206ee9d778/zorujomakib.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/kabawobapane.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/vevufebutigapuvajoxow.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/zuvitedofuviruwezadi.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/wijexowotoriko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=treatment+of+high+pulse+ratePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 16708 bytes
SHA-256: a0ab2eefb3f8d70e25eecf1899496b362494f4098f2baac13f01700ff2764fb1