Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee7388e448f33da…

MALICIOUS

PDF

88.8 KB Created: 2021-06-26 22:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1a1a583950ee2057668d2a1d36a58e9 SHA-1: 0adaee86584d0c6101505d7fa4c4026f20bdb113 SHA-256: cee7388e448f33da3c674a7aa6c8a93ba753b838d756cde1ce72a3a33a788ea7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of a link farm suggests an attempt to obscure the final malicious destination and potentially leverage SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://edwardlankin.com/clients/86087/File/tejezasimoviguripo.pdf
    • https://churchofgodinjamaica.org/app/webroot/files/mabimazefowumujilu.pdf
    • http://allnatureint.com/userfiles/file/xagorupezonurozuwifo.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f6541a59d---vokapupavamopo.pdf
    • http://utuin.net/files/fckeditor/file/30385923405.pdf
    • https://rosewoodcity.org/nbloom/fckuploads/file/98495993840.pdf
    • http://j-club.eu/userfiles/file/zerapuluguxixix.pdf
    • https://aartipalette.com/userfiles/file/bavasumuluzad.pdf
    • http://ed-web.cz/userfilesfile/luvapojowazikit.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/756b35454b18692f95e43edb331213c2/zeduzeluf.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608421db856d3---95218305198.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083dc2071368---39947682110.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077050e3a3a3---6701416730.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/6a06bbb5412be7d8a2b71cac678e07a5/96990831267.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/b5b7lan58ucjg2bsdb6n093eek/lodaguz.pdf
    • https://ivanda-commerce.hr/userfiles/file/80888162574.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c5340840a---21858066745.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/ea25bb5de6dd311f584052ba4bfbce0b/30155083732.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607532af49719---49200573221.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095855acdce8---56503880026.pdf
    • http://studiosaletta.it/userfiles/files/58120962923.pdf
    • https://weyergans-hcc.lv/userfiles/file/bexisudaxugogodawideb.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9e62b1cd7a16467e5a7714dd34d6c6eb/jiketaximumak.pdf
    • http://thaoduocquyhiem.com/userfiles/image/file/berazoki.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=surgery+for+pgmee+pdf+free+download
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b0.bin
51718bdb4e910b90f5fc458b579f3aa4bee24329468bcd114ce48b560da33b4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 10856 bytes
font_01_sfnt_off000112a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112A5 16792 bytes
font_02_sfnt_off00012ab7.bin
e190fef016157210304f4d5e1a2090e10d41c7f98ca67f4e71e28dc05095e2fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB7 16764 bytes