Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da259c8e6d8c711…

MALICIOUS

PDF

65.1 KB Created: 2021-09-21 09:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7e820bf13c32ffc403a8b94b6ec32afc SHA-1: 1054b5cb3b05956866a915bbce01621aa9dd32e2 SHA-256: 2da259c8e6d8c7119203f04126549e083f02019fa18ece2fcc35fe3a7293709c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to other PDF files hosted on compromised WordPress sites and disposable domains. This technique is commonly used to distribute malware or phishing content, with the goal of tricking users into downloading further malicious payloads. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5947

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 https://wastran.ru/uplcv?utm_term=java+lang+runtimeexception+unable+to+start+activity+componentinfo+in+android+studio PDF link annotation
    • http://kyanite.tv/userfiles/file/98253814759.pdfIn PDF document text
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/sujoxa.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/44724485290.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/1960546895.pdfIn PDF document text
    • http://dlzj.net/upload/files/2021091516542533492.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/duvedise.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/lofenafuratokedet.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/32622114670.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/33488613133.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/sodenigofedatadupuz.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/40160797949.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/kakiseluwakedig.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/a57a8ee249ea29b2f7bb0a146fb420af/36373080369.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/bitawonojovej.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161486b8c5aebb---9112088269.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/lizozemugajogogebiwolilit.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/mitanesexunas.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/7492162403.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161407ea4e03d6---meniru.pdfIn PDF document text
    • https://fptica.ru/images/file/85507597065.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/44231481898.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/b7559866a66c43fc539a8e4ab0d1d179/rorivabezezibaxozida.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/96442996814.pdfIn PDF document text
    • https://dichvumoinoi.com/ckfinder/userfiles/files/neluxidolimun.pdfIn PDF document text
    • http://prime42.ru/userfiles/files/165211986.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/45992744628.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FE 17120 bytes
SHA-256: fa8b169aba13ab8b15dab6f06cb6a552a84bbeaf17bbd368dcb223c50949221f