Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02f17c850d430c2…

MALICIOUS

PDF

86.1 KB Created: 2021-09-01 08:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5ddfa4f2f18cc40d6cc2a8e4fc3602c6 SHA-1: 10fe0c5e317e6308a51e26cfedec64ac8bd65a72 SHA-256: d02f17c850d430c23c3d3a892d942f18163da4197104455110d6730084d37954
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cructi.ru/uplcv?utm_term=film+the+seven+deadly+sins PDF link annotation
    • http://skogsformedling.se/bilder_umeny/File/tefasebis.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16128fb41b96ac---lujezadek.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/9173815890.pdfIn PDF document text
    • https://rieker-consulting.eu/files/file/37178720736.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///81795680308.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd8e3671f---34761292624.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/94991824528.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0c5f0e587eb5a1d6144f76b0f5abf6df/26282360221.pdfIn PDF document text
    • http://bakoca.hu/files/file/17134713595.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/jefib.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/cde5a811e3c27b48348e3b104aaf865c/pazuwejijusabukezosib.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd8ca188a01---65016533681.pdfIn PDF document text
    • https://jetaime-shop.com/files/76330848261.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a099ee9d7---89714574653.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/63041672502.pdfIn PDF document text
    • http://mcutech.net/files/neteluvoxan.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb56b1214a---pazupisuxikev.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160830dc817592---70493526169.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/xiwupelojo.pdfIn PDF document text
    • https://service-panev.com/userfiles/42342192671.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/61762576395.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/vodavixejugekodo.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_off0000ebb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB0 18068 bytes
SHA-256: 3acaec8d3f4c44f66fffaf58f2e6260ccf6c1aef3e36a3d90d32b986b373a5b8
font_01_sfnt_off00011a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13280 10448 bytes
SHA-256: db9fae7fd62fa0fb9728733d9c564f701602c00f3cd729328613017fe2994d69

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