Malicious PDF — malware analysis report

Static analysis result for SHA-256 1476f361f96338c6…

MALICIOUS

PDF

86.2 KB Created: 2021-09-06 13:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eaf152813ec77cec8671ee50451227ff SHA-1: dc7ac31bf614f3c06c21fa2e412c0a8fdaff5f93 SHA-256: 1476f361f96338c60920ce08c067d53451cbb9bafa6e2b8360f7a72f26ea761b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/d8f889f7686d577c54cc42b6bc437081/bodizogudemesugopako.pdf In PDF document text
    • http://woorymart.com/userData/board/file/nadomemizojikofaz.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/nuzemagejigugiwol.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/71401140168.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/73812532005.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/6aff9193fd4a1e6cd3f2b5482f1c1e13/21535067225.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/74396892156.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/jelovibuxevoboxavosededor.pdfIn PDF document text
    • http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/tububemusisenabo.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dddf9b2e4---27654341486.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/ce7a655c0ca6629a87f0065a8204ac88/26681547810.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/26620684969.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d23bd86a2---dibevodujerenaxugesa.pdfIn PDF document text
    • https://drlanda.hu/user/file/lilulemamexiruxokobe.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/24789473897.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608132c7726fa---19691172875.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f58362c3d---roxosu.pdfIn PDF document text
    • https://susta.vn/userfiles/file/widevikin.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4bec739d8---bodetuziwujazuku.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c059fe4aec---11602490334.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/83909024927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=colectivismo+definicion+pdfPDF link annotation
    • 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_off0000e233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE233 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA45 21784 bytes
SHA-256: ef4b400a1101182a1f0a8b38d3ccc2efb5dae3a224463b5289220e385aea54e3
font_02_sfnt_off000131e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E2 10616 bytes
SHA-256: ea513caea2fece1c19ed7724ae42eb468a2f1140353d27616b3d7a11e3bec134

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