Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21950abfb99018f…

MALICIOUS

PDF

98.2 KB Created: 2021-06-30 02:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4055a4799664755a980b816f45734f8d SHA-1: b0052e80a5142dcb46923809de9b6aa20d59d385 SHA-256: d21950abfb99018fbcb06a287b89bf521cc554e03f8aeaac2c8f0f4beddd07c6
196 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It directs users to install browser extensions or updates, a common tactic to steal credentials or install further malware. The embedded URLs and link farm structure suggest it is part of a larger phishing infrastructure designed to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://irlanc.ru/uplcv?utm_term=section+11.2+speed+and+velocity+answers+pdf PDF link annotation
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/f6bc3eea04714110bd95f2ccd79d5879/97441228468.pdfIn PDF document text
    • http://m2m2design.com/userfiles/13638357104.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/givemidiwelikelolewileva.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb4e53f938---16053386582.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b36fb6448---20640527868.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/gasixugekew.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/50327c76baf14008fb4dc4fbfa0cbbf6/10104606278.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081e459a802e---93208793212.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d934e231d6---rumulolevebenuwowi.pdfIn PDF document text
    • http://sdds.be/userfiles/file/nanemepezivuletasadi.pdfIn PDF document text
    • http://planbmedia.hufiles/90630029253.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ucq50d3knhv910q7pnoo1104g0/86420586770.pdfIn PDF document text
    • https://menu2uplus.com/images/file/46137722097.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/3oq0pvm1b3su0l5odsdim4lkk6/satozidovavidizopepo.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/vapogumimasodomugolawuxef.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cfee9a20070---geguporodejon.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/xoxivudoregat.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/24969950625.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/d3a6927557e34329d0f60dcaa14e199b/38458688191.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/tpf5rjbuhvrka0l523c4231lc6/mumonawebodediwise.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be66e6c51f---jejajoj.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/6c2575f416725535b7604d8c600ac546/zapoborivebeta.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ca1ec142d---56015136153.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_off00011aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B8 11192 bytes
SHA-256: d51fd8954f351801331037066377fe2933ad6ac6cd57c86f66db77acb36fdb5d
font_02_sfnt_off00014d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D32 17460 bytes
SHA-256: 9283e94af741a9f39e64b9c9e5a7cf5b478338c7c52fad1cbe2c1e97f9f768be

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