Malicious PDF — malware analysis report

Static analysis result for SHA-256 22198ef9280a6088…

MALICIOUS

PDF

83.0 KB Created: 2021-06-18 04:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b6accb3bf8e4b605909bf7a79b5931ee SHA-1: 86060dba87c37cda93cb83a6dcac0333c649e66b SHA-256: 22198ef9280a60887e7eca5a56a5b90bf538113810da62a1c302f699a4648c16
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing campaigns that leverage document lures. No scripts were extracted, but the extensive use of external links points to an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=black+history+lesson+plans+for+elementary PDF link annotation
    • http://bearings-home.com/userfiles/file/betukaruviboxaxupabiwusit.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/medova.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/b3ccbc7a6c0de8a28ec7c5c6f98278be/73606469376.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/3799135026.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e23d9928ed0856663bd5d42f9e53219d/dimite.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/2me5d7j7nah3h9tt1r865gsaat/28906579514.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/67558912ce72dce4896520239c6da796/zebiposijusuvokugal.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/somixuzizewuwowuvimiviref.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7e4a17bae---78856132801.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/2bai9s4rr82evghqt7ptbj1n53/balinapibowelab.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7efe5936---97299171048.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e8cee3361249531816a87ed859f71890/27193881250.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3683973c2---36558541188.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160be31bdd4fad---jogizoxegusuvefijonupi.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/62860408217.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2d6584c051930c8279d3e953ed59aa5c/21698976661.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076427d10496---fudipafapifugovozituzabeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 5468 bytes
SHA-256: 108c0d2b3e44ace14076cc696f49cc373bfeb297f3cd66493300da45003a0bf6
font_01_sfnt_off000119cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 10832 bytes
SHA-256: 1fad63bf7e4c1590e957fc4e5c8eae09b5fcd1120ab0b493d7dd7d1bbf874e15