Malicious PDF — malware analysis report

Static analysis result for SHA-256 00010ff4edfa8fb3…

MALICIOUS

PDF

153.2 KB Created: 2021-09-02 21:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1e3dde4810ec0ed9d0184b4cd0d6ebea SHA-1: e00481c24552ea906a7b28df8d7c42cbc86103a3 SHA-256: 00010ff4edfa8fb316bc3e7585d57b4cdca69d23367ebb680664bf0a13f5d651
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The heuristic firings indicate the PDF acts as a link farm, directing users to compromised WordPress sites and disposable hosting, likely to host further malicious content or phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://oncallanatomist.org/ckfinder/userfiles/files/patidalevoles.pdf In PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120abfbe8f05---begikovoburozemozukopepup.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/90348171415.pdfIn PDF document text
    • http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/sedefivomukenavirepu.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/bonadamowokerategugoxide.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/sakilalologa.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64b666da4b---jorovufus.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161129e5d93ad7---minixo.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/df2e1249e7b03705ff7e6c22d6cf97c4/bugab.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/0nk0fhg73429qnvt8ed3b97mdi/gopopedejupirakezetemer.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608191f4d90e3---59273773589.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/begubefo.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/mcima8ds5fg61ivj90uu5892qo/22338092776.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/80620453884.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/86608549923.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/jerire.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/56729179597.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/wilekefakinopipuzonam.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/35546371181.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/fejajibabimozolag.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/98932864532.pdfIn PDF document text
    • http://mobitransjogja.com/files/sixufobirerekodizep.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/v0e13brqhuvk9r7nsaofl9nv8e/86956172749.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/jodorifoviwipotijes.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b9dd47a83e8bef1581d1942667b916ee/favugajudufimopez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=phantom+4+pro+v2+manualPDF 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.netReferenced by PDF JavaScript
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseReferenced by PDF JavaScript

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2A6 10492 bytes
SHA-256: 40285fc95278655afa7666c89f34c3d2f7c37e0d1fe2907d96792896901b4d02
font_01_sfnt_off00020a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A5C 19504 bytes
SHA-256: 9fd81df55484ddbf8ad2633cf1ca3f8f210de30833cb8cd22d173b27a66acad5
font_02_sfnt_off00023cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23CD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1