Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d51c0536a4bd19…

MALICIOUS

PDF

93.4 KB Created: 2021-07-22 19:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 42991cefd73eb78fdcb8c2ee9859e397 SHA-1: 3bab633b2de83302b6ffda1ae5ed0e1bc6d5d446 SHA-256: b2d51c0536a4bd1901080976c3756bc3fff656d520bf549f83484f9e2ed7a0dc
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns suggest it's designed to lure users into clicking links that lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/br7aml20ajfgf43lom8k05frg7/39887401338.pdf In PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75485851203.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/7480870772.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/21667579920.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/pemuxojodarixovawilikiwej.pdfIn PDF document text
    • https://aneri12.eu/res/file/saxududekatuxuvufez.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078b395801d8---90909183103.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/vonowutujefapivijapeziv.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9254b3c57e---75101701518.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/40824445352.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/divedo.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b07c5fd51b2---labekanukibuzuze.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/d3ee5cf34786e240e18df3d41096a7c2/27521421709.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/bosubipusepumol.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/nivewowuxa.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/75853461394.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/26183727483.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b07154085b1---ferutid.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/96952802881.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55d3df3056---jifajekituxotorowepu.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c28b657a3---nusemowaxifexazigofito.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/a40da765a2538ce11f521186fde86bca/paliwiguvimogufigux.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/43ef7e87e83f329f01a2b581b3b91e62/65068269952.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=olympics+questions+and+answers+quizPDF link annotation
    • 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_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5D 11204 bytes
SHA-256: caaede42f78917430fcc5d6c6e2a6c119213d1cea6696b766417773d9a17a9ff
font_02_sfnt_off00013686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13686 18016 bytes
SHA-256: d0a993c18836b58977b6cc2be30cc210e86b27285a72a62360be2fde33bc2f74

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