Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e2501cdc9be7e7…

MALICIOUS

PDF

83.9 KB Created: 2021-07-18 21:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4a07aa1f34084e7473c739949924d91c SHA-1: bd844570e285b50b0839459fcad84b0caf01c3bb SHA-256: 26e2501cdc9be7e7714cbbfb0be844d6b3dab3cde0d834e4432daa7ae2c68882
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting it's designed to exploit vulnerabilities or trick users. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to copy/paste content into a shell, a common technique for executing downloaded payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tailormade-sales-marketing.com/userfiles/file/73659864923.pdf In PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/fabc1375fe001f556d045bc5cae5b5c3/4416193445.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/58185433379.pdfIn PDF document text
    • http://erictex.com/ufiles/files/83034917214.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/0848a27f4c81bc18daa5daf6db2b063d/zikasovakos.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160701c745dfd0---3789215819.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/mivuribu.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ed9qkbd2uust069pp2mpgksin7/26282503109.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/gupepu.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/7f3f2e5bdb97e63ff125b60a7450dd5f/bejowume.pdfIn PDF document text
    • http://fgosvo.ru/files/files/fifuj.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6b8848b7a476801ff586b6a8039c56f7/dulusaber.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/luus3ed2bd9ltrivl4i8ugvngd/kelatalerej.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd93072687b---xovesatalukuvivamevifa.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/lataremebabodeligikaxilib.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/21745942800.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/rikezegofulifegerajazikal.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/mmguj4caoem29iiushrti150fn/tevevisinaro.pdfIn PDF document text
    • http://kicopump.com/FileData/ckfinder/files/20210617_3846CDE2A7656ACC.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/dafixoxij.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/setijukakowanen.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/suzoze.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/32c09f7a3d970483a2b36b619511f82c/jevujawigaroxebitikul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=paytm+intraday+tradingPDF link annotation
    • 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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 10240 bytes
SHA-256: 65b861ce3bcc73a5652b87a1756cf4467ae2fdedc2c9cd7f4c52fd270532fd70
font_01_sfnt_off0000f9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 17756 bytes
SHA-256: 360c76f5decda527710c1d561fba4ad523d2109aacb9818fb0274da9c80e08da
font_02_sfnt_off000128e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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