Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9a0c4a05409223…

MALICIOUS

PDF

70.9 KB Created: 2021-06-06 03:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef78ea296a4035603368f2b0ef2e8219 SHA-1: ee8486c8dc9bcf6fbfd293dc3254b38c71b4488f SHA-256: df9a0c4a054092231a7daaeb594858014a07b58b4da3e2f39ab7319f6415aec5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or scam campaign, leveraging a 'Tableau training udemy' lure to redirect users to various compromised websites. The presence of numerous external URIs, many hosted on what appear to be compromised WordPress installations, strongly suggests a malicious intent to distribute further malware or conduct phishing operations. The ML classifier and ClamAV detection further corroborate its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8491

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=tableau+training+udemy
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/ughjl294seh2jofb7lorfiqs6m/63035509590.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b2e8766e1f1---41170953911.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098faa369c28---bivetanigiseg.pdf
    • http://kxnjl.com/userfiles/files/mawujazit.pdf
    • https://aimhc.com/userfiles/file/bewejul.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160854f908f3ab---nafenerevukujuket.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nsmpcm18i7vbp8q1o0cbjfmo40/mupewixu.pdf
    • http://alimentosldm.com/userfiles/file/kuxaguravamixirix.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3cdc3a8a4---fufedibupatufepidesuse.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d83c8d4625---27394751164.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b2552a9d---97608691449.pdf
    • https://bomberosdenavarra.com/userfiles_nexo/files/47573094614.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/fsg6gevuhtinmbhdc0nsq65joh/49930948425.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816c396604f---kukenigamuvi.pdf
    • http://adamlegal.com/userfiles/file/loboxitodawajekewunume.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a850fe9fd9---gubalesej.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/73233563834.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaac.bin
fa1c953cb97bb6058a9388b1e8c5083577b71e19953c41af06dd0d0f67ea696c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 5160 bytes
font_01_sfnt_off0000fc27.bin
14d87b2f999b59ba637e8d0650a3356c222ce195a484e279cd581d5e6423bdd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 10424 bytes

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