Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d0fc123923c7fc…

MALICIOUS

PDF

75.8 KB Created: 2021-09-24 23:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a2ed9d247aec9d34f28c4bd6456422da SHA-1: 8472c91fdc047afdb4b816ba8345376cb48c100b SHA-256: 24d0fc123923c7fc81159c3a2252f70eeb419c76e7b0650602f2df97a2e1a85c
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=city+play+new+apk PDF link annotation
    • http://studiolegaletrotta.eu/userfiles/files/54235974013.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/firad.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/ramuned.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/58109175413.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/36187154556.pdfIn PDF document text
    • https://petikdaun.com/contents/files/5585731863.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/43454609697.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/31390908976.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/66390524700.pdfIn PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/bewinuwubazeteduwevuxipe.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16135db796c5ec---nenibe.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rapoxawataxaxuton.pdfIn PDF document text
    • http://ocean-ex.com/images/blog/file/zipegejodo.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/musunelogenizidogad.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/58242354255.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130e4c997d6d---bixeme.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/4339734510.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/73047427952.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ff5247a4a8a05c4a212bc8117b3be98a/68660290203.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/e9862dd57e8746b9805f125746f5db3a/83240909556.pdfIn PDF document text
    • http://garderoba.sk/images/_file/46983381288.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/menamuxivasizupumavedibas.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/zakovejipodi.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/memutapudewuzizibokaxok.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_off0000bbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 21116 bytes
SHA-256: 9c2432b7c4b748d8b2fbf341bdb506199c9d9a568953e5e9c8433255d60f5311
font_02_sfnt_off00010b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B10 10180 bytes
SHA-256: 2218e2d8b843578f9984492c55081b892e5f3876dc5ed26408f27835b9f6dd54