Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf7842fc1b75902…

MALICIOUS

PDF

96.9 KB Created: 2021-07-13 01:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9d9784d5fe4da834dcee970614cc6d4d SHA-1: b57a3f2f9952c08fa3768727b4705e6a0d5a35c1 SHA-256: ccf7842fc1b759021b861375cf6743a84e9b03fca26d5c202f3abeffca4319c4
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised websites, many of which are hosted on disposable domains or use compromised CMS uploads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users into downloading further malicious content or phishing for information. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb23cc9e4e---nesakumukimuso.pdf In PDF document text
    • http://alternatifmedikal.com/img/userfiles/files/67255141282.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/28988618260.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/20403385107.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/246cns03rogma7172fphohd655/tidevamisudadisu.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/67690972874.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a0e5593a6---xipomobumarewixel.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803d0fe2f60---bonigonilenerawefedotez.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ac73ef148fd---volokasurinibesa.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb432d2d554---23137088887.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/gozimim.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/depavobubeximasajovuziw.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/38cdfef78bb84a703df7866249676b69/44263872151.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/cf07a02ca8a6b18af97dfaf8efa0cb93/32771169375.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/eubfvea65hm9385oeoenccckjp/72194301835.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/6pg0bsk79hcha0nko17v1j8rbp/52046854837.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/18097142885.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ac354470a---rigatude.pdfIn PDF document text
    • https://egf.tw/test2/images/file/55247854410.pdfIn PDF document text
    • http://medica-brno.com/files/17890134640.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ibrclvtvg8dae93bd1bg7a0ja7/pibewisaxaroxutiburefokeb.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/nisgts541b1l302orel3j0bfc3/11080819004.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=vector+boson+scatteringPDF 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_off000119f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F0 10468 bytes
SHA-256: 2b33ad226908f4369ac38e0f6931218d9138a5d493435399d59af68d9f2547a5
font_01_sfnt_off000131ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000149fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FC 17340 bytes
SHA-256: efbdc2e549dbcd3264688c05f76d7b34c822b73f4042750bee43cef9e20fd796

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