Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8e2e26973b9274…

MALICIOUS

PDF

70.2 KB Created: 2021-09-01 10:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7ad497a58520bdc65cbcecc1235e9f54 SHA-1: fb6345b0839dd0e0e02cde501f9ad704ff20979d SHA-256: ad8e2e26973b9274835f82921dbefd1d87ee24115e7e0ce4fe36b903a2fe7455
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://oniceh.ru/uplcv?utm_term=nearest+car+wash+from+this+location PDF link annotation
    • http://www.tobywells.org/media/fckdir/file/kiwijarepobuda.pdfIn PDF document text
    • http://vititanon.com/user_img/files/62421759419.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/papawenubutape.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/75714823326.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/f1hripaaem5iu6f4m5ern8g3m2/buvipokuwubu.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/1107042673.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16202319745155.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2bdc3a305aca0cf56fe5596bc57d2868/funeri.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16126e28083746---tejisodobopapoxama.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/34678732675.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/jibajuzejevajunasaxotune.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9952808e28---goresuvurejo.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/40904312263.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/51127221544.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc83b3409f---70615313751.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb7d3f0c6f---24869975245.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/88877231925.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/10411527600.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cbcbdc704---14085517828.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/89877947906.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2adc91985fcef95aec89ca71c26a8c14/zereteveg.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0e76f095f3f3e6fd3a6b46115eeaa8a4/41847851021.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/97667877927.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075f80b8c8bd---16434375985.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_off0000b438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB438 15100 bytes
SHA-256: 90ad83cc4ccd6d1ac2479a92b7c5278fe487c4bdc3f83d7aacf8e5507fdd8048
font_01_sfnt_off0000da01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA01 10664 bytes
SHA-256: 9a89c9bafd1a9665853942d7e815cc68771654b7227afd6080f8ba5a5aefe962
font_02_sfnt_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.