Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fc2949969a420d…

MALICIOUS

PDF

88.8 KB Created: 2021-08-16 01:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b5eabd0a4f4399c94eccc05f8b29510c SHA-1: 969c7b318161a301fd1639aa2407a6028a01d18d SHA-256: 20fc2949969a420db002e416ca2aac275af93d6d6d74d91092e1c82716e21023
236 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing and trojan delivery mechanism. It contains numerous links to compromised WordPress sites and disposable hosting, likely serving as a lure for a password-protected archive. The document's instructions to use remote support tools suggest an attempt to bypass security controls and facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/717e9eade714b909868b30c7e6994b37/19825602046.pdf In PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad2eacd9cb---nosigiwaw.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/riloriwefarafidebuvolada.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/nofavez.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/ivi7li0bkol57dva7vugjgtir1/jaxiwofarazero.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/fjdghbopqcdtrnt20rdvha8jit/motadanazasulu.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/27811141551.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/82ff1e9aada8441b383128106abb991a/35261767765.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/lunisokelimo.pdfIn PDF document text
    • https://redaelzaqaziqy.com/userfiles/file/futomatenudavoga.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/topumotukar.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/37f33ca285de7b347ab15f4037f0f48b/13589014543.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210704130126.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/52062076615.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/vpmh28fn98f2rtbcmib427hrcl/15650617408.pdfIn PDF document text
    • http://ihdbd.org/upload/files/nujorepafetuxepi.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/d6d5716b2d8655fc4a45a93c1436202a/ketebugaxomube.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af97fa6f441---97085031396.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/73924580582.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/xagivigoxaxafutarogebami.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb966b8474---92831769641.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/lebuzajower.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/ni9fvdotqmu0ps6219q192e1a6/gowugoguxuvumowim.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/wizavenuzurogapinaza.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/42360490353.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16088d239206fa---5487658763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=pokemon+x+y+3ds+emulator+downloadPDF 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_off0000f68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 17056 bytes
SHA-256: c2e28abbcf19e9b9fcdf05cbbe88e586707b8945b2c65039376ceadb3058224e
font_02_sfnt_off00013b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 10984 bytes
SHA-256: db13f1126959757a2fb657fb9d8cf3e1785c853f24d5f9b35a0d603490fdf011

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