Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ceb8d1d64bd5cc6…

MALICIOUS

PDF

82.8 KB Created: 2021-09-05 22:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab541ee72d9b057f8646c0bbb53a195f SHA-1: b5ed325844bda463d31bccc53674babe64f6f1a2 SHA-256: 9ceb8d1d64bd5cc61a4f7ac27b9e53576dec1cdd4b856127ac8a8daee079dc76
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads, indicating a likely phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://plenerowe.kbo.pl/ckfinder/userfiles/files/zujezuxegifa.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/guv0gj662drgqr6scqpunlv0o7/jenenewiwaf.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b8264de55ee39b0a74b8d5e19e19508c/riguxisanalurano.pdf
    • http://a-b-i-s.net/layout/bilder/file/vetajidujipalidizejege.pdf
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/ropikixodeki.pdf
    • https://www.casestilistas.es//ckfinder/userfiles/files/birevibulowavomavizi.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d1b04e09---futizoxigixewizevadexus.pdf
    • http://telmeed.com/web/ckfinder/userfiles/files/kejojexanavewibarog.pdf
    • http://bezagsecurity.cz/userfiles/37672474465.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160805f2906d8b---22543184633.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608117ac1f8ce---60038212989.pdf
    • http://innotec-industrie.be/userfiles/file/39896504285.pdf
    • http://saaretravel.ee/images/file/desisabowumadazutiguf.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e618f21a4---nomipiwirixepowob.pdf
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/878166713.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103337127eb0---69606142991.pdf
    • http://dataction.org/demo/dataction/media/jofitivatikikumunegeg.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a5b255d18dc71eb098b975fec83045c9/9838209199.pdf
    • https://rjpexport.com/files/setikudulejowakatiluxem.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb57944917---2154405850.pdf
    • http://thepnguyentran.vn/media/ftp/file/vesatorivokigulivanusasaw.pdf
    • http://lumieretvie.com/userfiles/file/24190060769.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/eh6fjtob479hogtkh9ls61puft/86388748548.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=manual+gearbox+car+parking+mod+apk+home
    • 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_off0000db91.bin
ed26f4b3610159c028b127ebd68a2b489b7b40d5f5b879df7bba6d252ceb9b57
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 11124 bytes
font_01_sfnt_off0000f4cf.bin
9b1d559a417f0061727927357151bd058599e3ee146943e60229288fc05da622
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 18680 bytes
font_02_sfnt_off00012566.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12566 16792 bytes