Malicious PDF — malware analysis report

Static analysis result for SHA-256 75013092079a8530…

MALICIOUS

PDF

84.1 KB Created: 2021-07-19 00:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7449638141dda53cbf0fd3bf9de369c5 SHA-1: f451335e0da72b3b24c2686efb9c8d6b1024410b SHA-256: 75013092079a8530ba8490482d3968b5c1cde455692a38bc23ec4f0d2878e502
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://digireg.at/upload/xawimexirakotewebixuki.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160969f513de2a---jobif.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/c1ef1f7ff22377de17f2d5cb8c2a78c5/rubupukuliv.pdf
    • http://adamlegal.com/userfiles/file/vutonofegituwodaluxusutit.pdf
    • https://cecprint.com/images/file/58355670151.pdf
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/26596197510.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/53159d74b5666e3810922c3c300c6d85/83627723749.pdf
    • http://ilovegabal.net/fckeditor/_upload/file/34545404828.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/en5ka15jrtsuis1h1ls0rpp561/pusoluresijefiwexu.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81b73d2d2b---zaneju.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160859c18c2155---68162139142.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fee5753391---34358199526.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7ca8252c4---vuwotofulunagufulidu.pdf
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/19958500005.pdf
    • https://sealordhotels.com/ckfinder/userfiles/files/99090212708.pdf
    • https://doluhosting.com/calisma2/files/uploads/71454733070.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac38c61b353---12428016733.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160864989062e4---61135458370.pdf
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/duxolipexukofib.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/74423a74ab08595821200768ccac1ade/nifamamari.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab707ea2616---nixakeligiwuxukifil.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160766d83819b1---jiburixiwuboror.pdf
    • http://nfc.soo.jp/file/13714489062.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=spider+man+far+from+home+4k+stream
    • 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_off0000e484.bin
b1a2ce023da79477966f67febc29a8ae02d3d5a2843aee649454b4ebdfdcf38d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 10964 bytes
font_01_sfnt_off0000fdc3.bin
ebc3c4db237b54f67ca5a379cab2d1617348545280f1d9306e42a9b3be5c94bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 17220 bytes
font_02_sfnt_off00012b20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 16792 bytes