Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dfc1ca880fc58e9…

MALICIOUS

PDF

107.2 KB Created: 2021-08-18 01:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 89d1789dd9bdddc63fc7c337d7dec5b4 SHA-1: f76b488d227f52796b186c9efd15fd14818ff9cb SHA-256: 7dfc1ca880fc58e9e23cdc65f1e65a2a413977104341af3ccb29f50163e99518
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9677

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=roblox+f3x+script+pastebin PDF link annotation
    • http://absolutelyneon.com/userfiles/file/39430579272.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/bekezejujaririfij.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fab20c7a639---xefirixetidiwurizafox.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/19d746cb51b885ecafec2acb217b31c7/28722282511.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a62f0b84964---12934544529.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/8nenfg4hg20ll2m493t0k3d5np/10476666957.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c1d1a95a5---31142392420.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/13074474203.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ab98ec5ca913c7c4975e80f95db9382c/77080766968.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e7c0644fc---pemebizofifibos.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/ef4340fc7d965714044a59f7f7e30fb8/87297017534.pdfIn PDF document text
    • http://kd-council.com/upfile/files/xuzosezovasiwivuxufanub.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/27048234931.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/be09a090f60d11f756883ebf9860f339/52311719138.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/6293775845.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/82679750270.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/bepodawelarinidenug.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/6399253220.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/tj1mr0sgv953fptfppmb42bqvu/jisij.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/b185b703a13292e166c4dd276e245d42/73067528452.pdfIn PDF document text
    • http://toyotalongbien.org/data/dulieu/files/7624881053.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/94127440056.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/linujixonalakirote.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/ruguto.pdfIn PDF document text
    • http://isvpro.com/custom/files/57436807337.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/2456599408.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/17431231442.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001174f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174F 17284 bytes
SHA-256: e5f898f7d979146be662fff13137b98c3fb590641749f4a53552943d47fed39a
font_01_sfnt_off00013153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13153 10932 bytes
SHA-256: 7e028a66ec410ed3196676e223a4d27658d408d7adfa4d0339feb9a4d709b309
font_02_sfnt_off00014aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000162b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162B8 22832 bytes
SHA-256: 3b4c8f6fb4ffa054b0380d046048d228c0c54585aaaf70a7b38796cf8a58dc51