Malicious PDF — malware analysis report

Static analysis result for SHA-256 588c3466c6e009f0…

MALICIOUS

PDF

71.3 KB Created: 2021-06-19 07:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5406e1509587288f8e574bbd0ae8c31 SHA-1: 78d7c91e0026846ebe234a876ff4cec3bb82657c SHA-256: 588c3466c6e009f09c712bb9e9c9b988591efb95fba6f4820306e72051655afd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into clicking malicious links. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://queure.ru/uplcv?utm_term=computer+hardware+devices
    • https://muratay.nl/userfiles/file/befivanadasuzusevomagake.pdf
    • https://satuldelut.ro/ckfinder/userfiles/files/fazerolukapaxudatajez.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/cc467e1668ba34cf3bd3eeb9d5d32fb7/67451556318.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beb940cc37---38966775372.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/00jgjdee41lg8ej50gudkcpq28/69969926026.pdf
    • http://luingpyrex.cz/foto/Image/file/89242307321.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074713d59412---vevasakugekom.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/mftlitubr0lgq9cqig3gt1p6df/rewojapip.pdf
    • https://poolpoint.be/uploads/file/76007613582.pdf
    • http://studiodrago.eu/userfiles/files/keluwo.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/jsjvvpr98or96khb6llun4ou06/17345460397.pdf
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/681f16f813258dea1edfeadf9135aae2/ketusefokif.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/769536b510f2acbcad69c54da8ebbb21/27380151920.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/b03cbt7hb7ds417ubfsghcr6ll/lifazadativubeninizo.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf5318ae57---fovefaxaxa.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a96fbf1d32c873d73c516e3f36817ad/noliraxenewuxebividotoli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da05.bin
ad2246d72f1a0a46695aa2493c57103000a6c0d96f945c3ebd225cd9dc83e3ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 5336 bytes
font_01_sfnt_off0000ec10.bin
6c9bc86a37764aac303628d5b3c365d8a1ad2fd129bd62c509eb9cde8f12863e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC10 10508 bytes

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