Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9c00846017745b…

MALICIOUS

PDF

84.2 KB Created: 2021-08-31 22:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17c48f23cec26f86a1d055774f0adb17 SHA-1: 2b87c5a53fda0006bdde97957f87cefdf50f8002 SHA-256: 8b9c00846017745b1bde0d6566dade99ed4d97b1ba71ea9cbfaeeb55b02844a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating phishing and Trojan activity. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://archism.ru/uplcv?utm_term=togo+is+in+which+continent
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/jjngkdck3cijesssmur3pt6485/44803786020.pdf
    • https://batikatravels.com/userfiles/file/nivelejudojiji.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611549080d56a---tosur.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bcb6a5a00---wukumiwodevoxoxezovam.pdf
    • https://addsfly.com/userfiles/file/gafekawabevupivolip.pdf
    • http://ck-kutnahora.cz/gais/image/file/98828248305.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9d96f1453---gawato.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a8f44fd9e48b72f0cb526b4d8ad342d3/powapozunodibasedana.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/kupuji.pdf
    • http://majorpropertygroup.com/userfiles/files/7177802765.pdf
    • http://www.lnk-creation.fr/upload/file/kevepapatapede.pdf
    • http://ivankotov.ru/img/lib/file/97243150111.pdf
    • https://medgal.pl/admin/ckfinder/userfiles/files/18942418465.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb85d09f82---kidotovidene.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/4b27bd43b7ba15ce8fe3b2e203e9ff7a/zokumomiziperimofudomu.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c1868ff419e---81622609272.pdf
    • http://www.moyekolodin.com/files/58926816762.pdf
    • http://bangkoksolarpower.com/syner_upload/images/files/govivenowabipedevubosizow.pdf
    • http://charivne.info/images/file/2259940076.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc0db39b61---javojuvobig.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/711mvtkt3m0jh4c3krh70t9od8/lemamemev.pdf
    • http://eot.mn/uploads/userfiles/files/medosofuxanukibafuwum.pdf
    • http://sakurahoaanhdao.com/webroot/img/files/digulixusavunitajabofub.pdf
    • http://wohingltd.com/userfiles/99907456808.pdf
    • http://flywings.sk/UserFiles/file/85711901989.pdf
    • https://alianzatours.com/imagenes/file/xutetanexorokexope.pdf
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mosejoz.pdf
    • http://jonesfamilygathering.com/clients/2/28/28a2af4908f4fae7f70f8b91082c1e08/File/lofabulebuxuvugis.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_off0000dc15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC15 16792 bytes
font_01_sfnt_off0000f42c.bin
124e8a98541f55f58834cf5edc42fa8746b62ad2cbb44768808390dcb3d2a3a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 10248 bytes
font_02_sfnt_off00010b3c.bin
eee63115a6bc6f4e1bc118365d4e72fda12b3c7525a16dceef34faa13a0e27be
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3C 20688 bytes