Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bca7b24cf2817b4…

MALICIOUS

PDF

85.5 KB Created: 2021-08-06 17:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 37ec7ea3786e4ded7ac10e99d4710721 SHA-1: 6be3f89ec9b20a99ff7295290aae5dd2a992e9dc SHA-256: 2bca7b24cf2817b4dad49082d445120bcf1d0fa980bf69e793fd9024832a010f
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of a phishing and malware distribution lure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document prompts the user to install a browser extension or update, a common tactic for credential theft or malware delivery. While no scripts were directly extracted, the presence of numerous links, some pointing to compromised CMS uploads and disposable hosting, suggests an attempt to redirect users to malicious sites. The document's structure and embedded links align with a phishing attack aiming to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://asja-doll.ru/userfiles/file/fubulamobezizofekekugizab.pdf In PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/dikoxipanurizipajo.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/ruvuge.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec5a242578---1099291470.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d643903e0---86300894324.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160fb8f32d502c---zuxivokufogu.pdfIn PDF document text
    • http://rayanchem.com/d/files/71137597160.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/097cdce62586308abd05daca7465de12/84936574590.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/j11cli9clg1fcoo2ft4bidnu2c/lebinosafuriwazurabas.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a09c7f26938---rarimovokiberokexazadoxoz.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/monaz.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/fad81e30df0de9ed2608477aaebd2efb/1522461205.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086344e3268a---26603862938.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/vukajuzuteri.pdfIn PDF document text
    • http://garderoba.sk/images/_file/xilosajum.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/tivewejixutozixero.pdfIn PDF document text
    • http://classtool.info/upload/files/60564787998.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/28016035176.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/iads1rh6gttpl1kkqdmfvfmnlt/90795786725.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/lawuvemu.pdfIn PDF document text
    • https://spacio.hk/attachment/file/29351143562.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c961a0f3988---rumababuribu.pdfIn PDF document text
    • https://t2sc.me/userfiles/mugezapew.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/um1uk1me6c068oeme1evuei87v/17866352978.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=padman+full+movie+online+free+with+english+subtitlesPDF 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_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EF 11192 bytes
SHA-256: a5e59c5dce479ef2d1fbfe39d3bb017f7a55acd1592b4a0afd34d7e5cf49182e
font_02_sfnt_off00011dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC4 16280 bytes
SHA-256: 9c36f1d6beb0c316fd3f9037dfb8182637943c23a22f475e1a657b0fb9059d5e

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