Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e9ea3dcb8b43e0…

MALICIOUS

PDF

72.8 KB Created: 2021-09-03 01:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7bc2596a3a7a06dcd54301ac4a2886b3 SHA-1: 34f769a0454d83d5f5675d830e9f2d20695827c6 SHA-256: e3e9ea3dcb8b43e037ba8ef2a076346e5661adf43fb308e654f52c8a70de46af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1ead4d0fa---gusogofaz.pdf In PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/72128528701.pdfIn PDF document text
    • https://bbmint.com/userfiles/file/lukumorizuje.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/4f7229dd20957664ed6dbab601eed581/42955677344.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/d0e1eb638832224fe99e20de073a3f11/76711162133.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/penovij.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/7v205fojjttjbp8dpnbil60rf3/25363358347.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/39566424922.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c633bb3c97---pimagitepe.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/55940151065.pdfIn PDF document text
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/crgbdhmq6og3gkga1cks1cifbn/bogamab.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/34807679726.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/sigimarisojebef.pdfIn PDF document text
    • http://grimastone.ru/files/xapefafoxemamage.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/21840891811.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/somovefesegaranewan.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/tumikupenanufonepimo.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/5betadrmdv6clhg6niil76uj53/fikolitoruzusirorox.pdfIn PDF document text
    • https://tigaintan.com/contents//files/nafurejenipirofi.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d76041add---95184899989.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/donaxaburegime.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/jaxeludon.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161171adf358ca---tavufijudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=linear+and+quadratic+equations+worksheet+with+answersPDF 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_off0000b8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B1 17076 bytes
SHA-256: 0776a5d96f0b1a64c33b7670491ab10796dd412ee3b4caba26a03a6021f6efee
font_01_sfnt_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFC 10804 bytes
SHA-256: b4e9aba956d1093a3a302fa6a2cd6ce706a06fb83f507f08a6b669479ca63610

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