Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ce111df206cf4a…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 05:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a13f57af3bc159bd3ea3ba212a4126c1 SHA-1: b8cb3bfb616ec1998989a193912ce22d014f92dd SHA-256: f7ce111df206cf4ab7f680f52206cba3009b0641356e550c53e9ac29d08782a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised or disposable domains, suggesting a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the presence of external URIs and compromised CMS uploads points to a malicious distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://archism.ru/uplcv?utm_term=mr+majnu+full+movie PDF link annotation
    • http://savemaxint.com/files/file/tuvafepugizawiwiwavozemor.pdfIn PDF document text
    • https://bellcera.60km.com/upload/files/gimatuwugarawajafadewezed.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/sowapixuritefazed.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/22329654768.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/jujonupisuvukuxopuxaza.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/85349839463.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6c1873025---vowokonava.pdfIn PDF document text
    • https://isosklo.cz/uploads/91676546496.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/xakaduwada.pdfIn PDF document text
    • http://sfinance.mn/userfiles/files/levisige.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/60618289024.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/9640537326.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219215589527.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/84651248530.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/3b3c00b0dda5a5d57b65747d0eaa7b28/9412090489.pdfIn PDF document text
    • https://svezadjecu.me/userfiles/file/71070697201.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161491993b2434---tetexoge.pdfIn PDF document text
    • http://woykoff.hu/upload/file/26811853080.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16146f7f275751---78379501019.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/84933496962.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/xasijenipa.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/9325916751.pdfIn PDF document text
    • http://theatergruppe-nestelbach.com/rogan/admin/fckeditor/bilder/file/lezemuni.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/hljqiotbkcpet4s1tcl7qjgup6/kogiwunaw.pdfIn 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://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_off0000afb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CD 10396 bytes
SHA-256: ef8fbfde97a3731c3d13fc53db47e51acec064da4a67326bb789c59054174b2d
font_02_sfnt_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 15196 bytes
SHA-256: 5c7e5bf9a83b1ce406760a08085ae80b7c0bf3574ab561b6bad7488ef7050b9d

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