Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecb45b6917f7218…

MALICIOUS

PDF

102.6 KB Created: 2021-09-02 06:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1267e2bb33fb2be4a67a1869db18c759 SHA-1: c71d3afaa6c636b2bba49112250bc459328b7d65 SHA-256: 9ecb45b6917f72186f5862b1a350baaf2640410db4a6eb3032788b2e1fe94288
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 pointing to compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the structure of the PDF suggest it is intended to redirect users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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 http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/39760353787.pdf In PDF document text
    • https://leavingcare3plus.ch/userfiles/files/9770108489.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/15424010313.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612774d9214eb---76468968965.pdfIn PDF document text
    • http://chapmanhighschoolclassof1968.com/clients/c/cb/cb1fed5110c07f199f416a264ee6943c/File/91793159533.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c53d0cadf0---15471510253.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/5450484355.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55c15b9a00---52190056104.pdfIn PDF document text
    • http://fxmeat.com/upload/file/42225477c498c3a68a1d8f457d832c93.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/d242a8ba8179c38f397d3d17cf7c60b2/37024706808.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/43124235641.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/gcpacurcsq017q61hskshhoil6/90715441673.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/48535568995.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/79871204604.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/2386871ff68c941fed9eb39b34f513c1/59432799006.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160962cddb34d1---27549668850.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202189163329269.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/wanodu.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c737a9dc---jezijitases.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/567f47b54115d3dec44e3e6f15a12fce/jepukasu.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/metasegeletax.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079ddf23c703---modamoririwimojada.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/11690787227.pdfIn PDF document text
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/pirugozisolemo.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/dizemovejemudisuzedixo.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/jopujof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pitch+perfect+3+full+moviePDF 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_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000140b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B0 18804 bytes
SHA-256: d86cf72cfe43f81c18dc9f19f27e11dabe323ead91308a7f4716e47ec1b7d480
font_02_sfnt_off0001716e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1716E 10648 bytes
SHA-256: 5182bbb5cabf5eca2078f6b59594e2e720dab035deb9dab32b110d2222ebcbf9

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