Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b73dab302f1f22…

MALICIOUS

PDF

79.9 KB Created: 2021-09-12 11:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: daa0223fcc083bb938b0d1ca2e5cfa10 SHA-1: ccfda9ef0f8647002f1ac48b924f43f6d28bfc43 SHA-256: 03b73dab302f1f229bd5e3edce2aa74d40cc1466267d09ac0cf2ab97c1c0bf18
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are structured as link farms or disposable hosting, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=how+democracies+die+read+online
    • https://detskeihriska.eu/ckfinder/userfiles/files/vinipejedodipudexudalojo.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161303f5b0157b---lufawojisan.pdf
    • http://streetnn.ru/data/upload/ck/files/55812723661.pdf
    • http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1631043028.pdf
    • https://mtydizayn.com/userfiles/file/rogigi.pdf
    • http://dietetyka-24.pl/images/files/siwunofufirusir.pdf
    • http://pn-tech.net/userData/board/file/74539902952.pdf
    • http://rovitek.com/userfiles/file/10494560705.pdf
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/kisanipepuxugilod.pdf
    • https://3rproject.eu/ckfinder/userfiles/files/nimomoselalefosozapiborov.pdf
    • https://pankajplast.com/ckfinder/userfiles/files/kosifebaludiminuf.pdf
    • http://www.salpasafarit.fi/tiedostot/files/reromudo.pdf
    • http://accapierre.it/userfiles/files/64664440615.pdf
    • http://pvvc.cz/files/kuvirisuvokiwusapepu.pdf
    • https://led7.ru/file/nifitanudifuf.pdf
    • http://industrialsupplies.pk/userfiles/files/76828605383.pdf
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/9336403414.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d280b25a6e---majetesexuvulerikisub.pdf
    • https://thisissati.com/userfiles/files/zoxupategafolagin.pdf
    • http://codienlanhminhquang.com/upload/files/zupudofi.pdf
    • http://wijnhuis-vaessen.nl/site/data/ws/files/83884441278.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d51f.bin
ec8d0ebb1a74ce6741d058296b0e7366dfcef23e330724f5e748aca901966289		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 10508 bytes
font_01_sfnt_off0000ecf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 16792 bytes
font_02_sfnt_off00010508.bin
7a8732243a57a8a2b651014c02db9d65804207e912086cf602378ca2d26081ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10508 17428 bytes

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