Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60ff4e3c5b621b7…

MALICIOUS

PDF

118.7 KB Created: 2021-06-28 02:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 683b30b685f87491c7633a066972f7b6 SHA-1: 8ed41dcac4af2167b26d92d050f82e7e7a35874c SHA-256: e60ff4e3c5b621b74d16345f4c15b38f5e703d2cd2a1e71107a4fa33597664d6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely lead to phishing pages or further malware downloads, serving as a distribution mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93fcfc0861---42354234854.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/73b7ff24f21f0044b336daa35086f62e/xeseforavofumewutan.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/f901m4jokfbji7m70ja6hnpj87/62918738021.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607c68f35064f---4949805437.pdf
    • https://aradmissions.com/ci/userfiles/files/87174158694.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/71c0bdba12e9414fd34d2dd092b202c7/dufopetezububed.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c98ca491358---65879213776.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc24c29af6b---7001093924.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6516a9bc5---35957736094.pdf
    • https://dcimx.com/files/2431403629.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3b3665de2---wenowonususitodosifibawi.pdf
    • http://adams-gold.ru/archive/image/file/danesoz.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/uvs6f274qggefujjca3h0dgkfs/tufomamorovigukodaluj.pdf
    • http://www.allatpatikapecs.hu/images/file/77357011507.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/25aajvsfsskjfhu6ql50s9hq6d/paweso.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/8vcb3v3ridlssm73n0aictaf86/92120055136.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/vng67sgqa71f9ppdk8aqu47p0c/35196920617.pdf
    • http://apartmaji-zunicmile.com/uporabnik/file/44450243746.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/8d667a5a14a6f304d9c52e6ffeec903d/4480610646.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c816b68cf---gezaxasiziku.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16076316beea25---femeturewowa.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/748484bea1fc8e8a0442d213c6301c0e/73646693997.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1af91761f---pudakurosonodogoxuxa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=alcohol+is+used+in+barium+sulphate+reagent+to+prevent
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014fa7.bin
650e5a3686254ee8c5b7ab78dacb7e1526e81a4945b0f9d9217cd88cce39794d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA7 20592 bytes
font_01_sfnt_off00018520.bin
9901abe9a3d07e4bbc6cb1a69a3dea94a99da46bfb543fbd4022e2a2a36789d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x18520 11248 bytes
font_02_sfnt_off00019eec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19EEC 16792 bytes
font_03_sfnt_off0001b6fd.bin
61893c6f5a4ed8be90b59e62ba5f7845fe3f782be61d2927f64273611613f2a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6FD 16160 bytes