Malicious PDF — malware analysis report

Static analysis result for SHA-256 974cc68bf71b7060…

MALICIOUS

PDF

85.4 KB Created: 2021-09-17 17:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 85e812109754766c79b1779178d331b3 SHA-1: 6b61228718b858d1bb1083eeefd8cb43b18dccdd SHA-256: 974cc68bf71b70604cdbed8761bac4d8fb4bd528a58e9ac3c139b2618c61ddd4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests a phishing or credential harvesting campaign. The file's structure and embedded URLs point towards an attempt to redirect users to malicious websites, likely to exploit vulnerabilities or trick them into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://pistant.ru/uplcv?utm_term=android+find+iccid PDF link annotation
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16141d54e347d0---zejaxomedaxobabunu.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/23419094802.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/fokabubiluxetutexifegig.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/566c629f3dd5dfb20afdd702111daccc/99972376907.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/xogozifobesirezid.pdfIn PDF document text
    • https://atlantidegattico.it/file/64550945730.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/46383232148.pdfIn PDF document text
    • http://open.ua/uploads/ckeditor/files/megisujepoxexo.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/56183837766.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65800349418.pdfIn PDF document text
    • https://marlschuz.com/userfiles/files/95776835075.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/nuxaxogomarofexi.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/zisakuwasabezofotuwa.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/62156583742.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/filobepevimope.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/faxogoliwokevi.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/muvejarakalavesagijo.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/95890100688.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/rovigoju.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/gewamo.pdfIn PDF document text
    • http://seritour.com/rsm/files/bilegikeruxamivekunawomos.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/meriwanulumab.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37533066720.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/pimewuvunadazuxu.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/54402178773.pdfIn PDF document text
    • https://vleek.com/uploads/files/silidipenavoperorowo.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_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 18828 bytes
SHA-256: 6bab0a3a71c12d1769b770318ec0e75f78655ef9807a8b3e9d141b3df3083aa4
font_02_sfnt_off00013286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13286 9844 bytes
SHA-256: c6a1e378a95ae469371664e252a188cc241547221d0868652b90dd4e8b1d51f6