Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d964c9adba5b82…

MALICIOUS

PDF

87.5 KB Created: 2021-07-02 04:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ce8ab5cfe65f265d926d79aa0465956 SHA-1: 090695402f04657f6304b3b8c1856a73b1aff709 SHA-256: d4d964c9adba5b82fe83f7e01382c3de7951f4d658b444871e5eea0722742747
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of URLs like 'https://philabc.ru/uplcv?utm_term=gta+2+free+download+for+android' indicates a lure to download potentially unwanted or malicious software. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=gta+2+free+download+for+android
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/25f1590aedf13cee8200faac57b61fef/70808317266.pdf
    • http://ladakhtripmaker.com/userfiles/files/53435809977.pdf
    • http://alliance-ltd.com/userfiles/58363105831.pdf
    • http://bidwoodmachine.com/d/files/nuruwisewurutupafivab.pdf
    • http://amadpich.com/userfiles/file/52808672571.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d967bf27c---nesilugexilumaso.pdf
    • http://biurod9.pl/public/userfiles/file/55419192785.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/vipuvuferunige.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1782d13d4---50676244742.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/1e264189adfdc4f5cbea998fb5415b9e/45741839371.pdf
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/kisenedamitabekatiro.pdf
    • https://mumegram.com/userfiles/file/nelol.pdf
    • http://alnoorcity.com/userfiles/file/82931528368.pdf
    • http://rkmaster.ru/uploads/files/sikepokarozusuj.pdf
    • http://heyumpnd.com/userfiles/file///95404144934.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1ec1c39cd---7826515377.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/44dff0c56c0ddddbd37acdb067e1d8ba/vipopogaxonutip.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/a170574168392bcc88be86b01c2f00cc/71689131732.pdf
    • http://duda-tech.pl/dudatech/upload/file/rigomikogakibifesu.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2da5457cc---97243308070.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/1ql7ifqfh2gm4dcl2s7d5sfdpf/66618806030.pdf
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/piruxepezifubutu.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16085e946aad54---jaxexewovenixomumiso.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/9dfda87bf8c33e62db716072707f7ac3/rulebolaxugonege.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_off0000f613.bin
3c55be98a245b4d9d9b75f44fbe9d60d8d5eba5b8baa187e8144a4b41142fc4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 10424 bytes
font_01_sfnt_off00010df0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 16792 bytes
font_02_sfnt_off00012602.bin
f59fbb666c7f2d8d3a9c1c0bdd8f1561a216bd2dc3448979336fbefb69ed0646
pdf-font-stream PDF embedded font (sfnt) at offset 0x12602 16580 bytes