Malicious PDF — malware analysis report

Static analysis result for SHA-256 274d609b6ce535b2…

MALICIOUS

PDF

75.1 KB Created: 2021-09-01 21:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a207a3c3e78f2a611c63294e916195de SHA-1: 498eac325d68a149a32609a97952d8b277334e90 SHA-256: 274d609b6ce535b236df9e4e70a45ef667df3a180a60e939c4d22b90181dacbf
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, suggesting a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery via these external links.

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://drafthe.ru/uplcv?utm_term=html+css+javascript+basic+interview+questions PDF link annotation
    • http://nfrostov.ru/upload/files/87754160004.pdfIn PDF document text
    • http://charontrade.hu/data/file/68259952067.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/xivesobagugizo.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/i2e7hu2rk75un2e3r51006gtom/rapapexavisokisegow.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/76198206425.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd85f09028---xirugekoribujoduwud.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160960bfdf1fdd---87572284685.pdfIn PDF document text
    • http://izr.fr/files/79279797105.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/22821428909.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/mopelolajelujesu.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db7fc92330---lizaluwijiwene.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/subiwinaxogesu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e009c45ec9f---dirawijipuzejabibo.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/32243062754.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/19785864938.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac9cf1b251---tazelo.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/subunelegabun.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/xejuwidizagebuguzopuz.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/tirewuvimetekaze.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/coad75q3n6utgjm7b1quqgj192/62651341460.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021082118135416.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/taxubukuwuwenil.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cd690a8f3d6---pasuvodepijaxunat.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_off0000c0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F9 11192 bytes
SHA-256: 61c7dc1bf5679105d8476f5a444136c83db66f3a90e2075fddc4c93c15d17aca
font_02_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 16136 bytes
SHA-256: 4d0a24ea889e6045bdfcc7f6cc84732bab625aa918ff116aab8122da25d588e6

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