Malicious PDF — malware analysis report

Static analysis result for SHA-256 94aab889b0356c6e…

MALICIOUS

PDF

92.6 KB Created: 2021-09-05 03:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 677b0b268a07a4c45846ca93e20c2b08 SHA-1: 1e12f5f7766c6fdfebbfafea57d272881ea4f729 SHA-256: 94aab889b0356c6e81ecd4b8ed601bebbb85f065cdff5c1ba3bb922b4fd0a4f4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and social engineering lure. The document's structure and embedded URLs suggest it is part of a link farm hosted on compromised WordPress sites and disposable domains, aiming to trick users into downloading malicious browser extensions or updates. While no scripts were explicitly extracted, the presence of PDF_URI and SE_BROWSER_INSTALL_LURE heuristics indicates an attempt to exploit user trust for credential theft or malware installation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://irlanc.ru/uplcv?utm_term=create+pdf+from+webpage+javascript PDF link annotation
    • http://superfishinglewood.com/uploads/files/titonevilubunosex.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/golomokis.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a23105c0c1---zabotew.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16116d406e3e4e---88809122532.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3595b15a1---xewuxasu.pdfIn PDF document text
    • http://sakem.org/userfiles/files/rowezamatime.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/464cc378c0d9a9a03a057734393d38be/26333408933.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/a25058acd2feef20628ce1c84eb77c57/pilixadepebebosudari.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/65781618921.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/a804900afe17f43a0c84ba9f611c4835/66563527909.pdfIn PDF document text
    • https://drsaman.com/files/29404066844.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/c06058eee8bba3a9fb09ec75b7d914de/4640942742.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/19168977023.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/81290375070.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/311a0731b67f941c861356185d848083/96808632193.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/wuforativajel.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/vemarodosewixi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fac37335e3---sozutebidugozikozivowenis.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072ac57f2436---39798497960.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/97695191f2b6a954a82d64a058f309d2/zufuwubidevowavelawen.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/tuxezesodukizo.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/g61q6qvkocceae26ntp19ahqjt/21707468604.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_off0000fe67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE67 19620 bytes
SHA-256: 245f445c1acb8b8b22a8a7e62d744a4060e722bf397bf089da0935ed6c6c30b8
font_01_sfnt_off00013215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13215 11268 bytes
SHA-256: 072aa5833c40038b8c7de39c13dfa284d16054aadad6025c1a392eb90798a6be
font_02_sfnt_off00014c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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