Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2a01914564e86b…

MALICIOUS

PDF

79.7 KB Created: 2021-06-26 13:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22fc3f5c0ef5f2fe3762bc0ad4bd9abd SHA-1: 2cdd0f18b997328dcc9f8e6adf96e0959d4bdee5 SHA-256: 9c2a01914564e86b77f54ca99bc79107b0d8791a58b54969ab4ae94536e46f3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=dragon+ball+legends+how+to+get+chrono+crystals
    • http://abwcrainhwy.com/uploads/files/nofabino.pdf
    • http://beateromer.com/bilder/file/62467634791.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/b7b995be6b2232cf3085f1595d6864e4/82775895246.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/5a5955c7ee3bdbfa6c098159cf4f33e3/dovijisuw.pdf
    • http://anhuifan.com/upload_fck/file/2021-6-3/20210603103135907385.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9f9433f0---vetifibaxagubefiju.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0ff26e414---wazedoboguzejutafugu.pdf
    • http://megalabsrl.it/userfiles/files/98279771573.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af7e9cdfce8---57954998921.pdf
    • http://amadpich.com/userfiles/file/sisibit.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/14d4fa36e463ea0b2bad5e6dd89468b1/92254757191.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a968b197ece---vasaw.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0fa698d24---2337341322.pdf
    • http://geometrabottero.it/userfiles/files/181052845.pdf
    • https://etcbt.com/userfiles/file/pijemafoximuvipatemoremiz.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa86c82166a---32780299115.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2492986a---78811242711.pdf
    • https://xlspandoek.nl/userfiles/file/52865488541.pdf
    • https://aulacvn.com/upload/fck/file/xuzebetokavusubotulo.pdf
    • http://forumcutuca.com/ckfinder/userfiles/files/toxulelasejej.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc6b66b496c7dd4ceb82f62106d806b8/25880991081.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_off0000d391.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD391 16792 bytes
font_01_sfnt_off0000eba3.bin
480731aa61920a4cda78d02f71deaea3907f42c8dd5e4f1387727b053fcf6aa5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 17120 bytes
font_02_sfnt_off000118b5.bin
c28ccdb27ed0c21464d290041f32a70f2663394437794f72f7939c3c2da40509
pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 10900 bytes