Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e5d6193051195f…

MALICIOUS

PDF

76.8 KB Created: 2021-08-15 16:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0a6b51fe8f7153ed5040571944c82892 SHA-1: f57c2340643ae0938eda2883b78ece9cd25a9419 SHA-256: f2e5d6193051195fb973ea38c276114747de40e0dad74db38ac93ebae447f152
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of URLs, many pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://coretry.ru/uplcv?utm_term=auditing+it+infrastructures+for+compliance+2nd+edition+pdf PDF link annotation
    • http://struttur-arch.it/userfiles/files/womemurexigajinapezime.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160727c1c39a1d---wataradomazuxilox.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/mudibuxekapis.pdfIn PDF document text
    • https://mytopics.it/uploads/file/72627458665.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5a7853b30dc85d89f4e81c7763ceb8e0/69970189711.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/b8027d8a770b993d55e7caf7e968fa11/56641132706.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/ead78171d03669e18abf8ad4b8cc4c5e/pujabuzavitugowox.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/71784104847.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/2f271d6e4a13c8e640b2ac6bd4f074e8/mokewiwinumevaleweratevu.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/74214103058.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/a281a21b6a6987160899fb08a4dffc7a/81373240094.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/7q5ai62lhralluqepg3ib1fkj0/verozojovijona.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/1650571878.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a53b7fc8895---20854740388.pdfIn PDF document text
    • https://renault-service.com/userfiles/13480456303.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1ou5isa5ifvpo1fhd5tses3u86/26657709523.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/31461166039.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/31757339866.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/a61f517ec44dfe7e467e01d6d9c6e9f1/gogosaloweroratude.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/puvikeradasijemid.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/72533544651.pdfIn PDF document text
    • http://haus-st-otmar.ch/userfiles/files/25747443081.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/dovulolewolerabase.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/af30f4849fedb2c14bdb421fc7fdcf30/33479248933.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6aeedf87---sazunulalevajizu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC704 11164 bytes
SHA-256: a8adaeba3d1d9196683ef49ad6282baeeeff7772259ce777d7d53b878effe672
font_01_sfnt_off0000e0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 16860 bytes
SHA-256: 9b4530b54bf183d4aa00769d9fecd6e6fedc7dbf2974606b0b04f65ec79b88f0
font_02_sfnt_off00010ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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