Malicious PDF — malware analysis report

Static analysis result for SHA-256 8996ccdb9b63ff09…

MALICIOUS

PDF

72.5 KB Created: 2021-10-04 04:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bdb227bbae80a16daaf56d70ed580902 SHA-1: 4b2221a9d6167431717c8c46b58dd30fb9c3165c SHA-256: 8996ccdb9b63ff0914c5e831bb22fd8a3bde3c0961a2ee2ed98ff6586d9ec9a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. These heuristics, combined with ML and ClamAV detections, strongly indicate a malicious intent to redirect users to potentially harmful content. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=manchester+nh+mall+hours PDF link annotation
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161514a5fd2097---85271345835.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/75936587054.pdfIn PDF document text
    • http://dezis.ru/uploads/files/lepane.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/zekoverezowoxig.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/senunasigavazoj.pdfIn PDF document text
    • https://marthomaktrplrdiocese.org/ckfinder/userfiles/files/60593694132.pdfIn PDF document text
    • https://loyd.rs/images/file/6153035502.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1615696ae7cd90---gipexobaruto.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16153ce9f8537a---xuvuvamisoteda.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/ritizolenazurimuzobuso.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148af579f087---zedosusokewidupakopum.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156c703396f2---dewedu.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/161324b009e8dc---36512238135.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/4511980092.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/posomada.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/0flvlfqunn7a5eusf4tatfpggv/48784557300.pdfIn PDF document text
    • http://mgrima.com/files/file/32726333823.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7b329206d---ximudedivusepomaxo.pdfIn PDF document text
    • http://thsport.dk/userfiles/file/zokovimivexazumi.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/vasobivolerigefiram.pdfIn PDF document text
    • http://africahistory.net/africahistory/upload/files/tidifegave.pdfIn PDF document text
    • https://attack.lt/images/files/ridavetijilakulo.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613962ced3944---14701984778.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/40924335908.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/65234937875.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_off0000b6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F0 17696 bytes
SHA-256: 3bbe89db77035234759a361d4d10243508a9812f55192525eea53fe61517e6ac
font_01_sfnt_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 10496 bytes
SHA-256: 34a961748eec1bf178bd9ae075222d2fe76490096433ebf26e9d90223ae95f66
font_02_sfnt_off0000fbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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