Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eafe69d995686a…

MALICIOUS

PDF

80.6 KB Created: 2021-09-07 07:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 041719e772a8eb34d9622891d3b5ef93 SHA-1: 338817d946e16fce71157fd25f3d7dd72bb74b98 SHA-256: c6eafe69d995686a129a93847b289f0e743e62df60c1c5c2040803b4169c5c5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of 'utm_term' parameters in URLs suggest an attempt to lure users through search engines or phishing campaigns. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crysiq.ru/uplcv?utm_term=abundance+of+katherines+pdf PDF link annotation
    • http://palyavalaszto.hu/teszt/upload/file/wupiti.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/vibiwidixuteketelututomin.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55fc742794---puwibudu.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/40114905654.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/7ec897d26dc6d85366e41d9a6adcdbeb/51434028081.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/655b8695433b1a80f19c0ce556decb34/kuzexoraleruta.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/kesekujiwizaxesujane.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d4c0d1ccd---68923815091.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16105ba3e6cf9e---sosaloxosagika.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/tabekezekubufe.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/zujutuvopadoxo.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/7e74f7762df3d0874228ce7a660afdac/novikoginefewawo.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/45705891490.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/wuramikatixofeverowam.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/vaketexuxoxoturifovemut.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/58552019562.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b14a161e0f3---fogelikunifaxisuxulisu.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/e97feec2a8c2cc72d7df2d553c59aca3/rifomag.pdfIn PDF document text
    • http://u15.ch/ckfinder/userfiles/files/meliperubuvujefonove.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/majewofofurezexo.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sumurexas.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/7ed0ef484c5c409186e43e60bfc66f9e/82549089925.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/mafepuwemori.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_off0000d84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84D 10984 bytes
SHA-256: bee2bf4063d54c9c7b5f9c994905a23f33dd6f5effea427b0b5f6ae4339a7cba
font_01_sfnt_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 16748 bytes
SHA-256: 4d7abeadbabd411a13a5eaf7dcbdddd5de6d3248775333b023ea2812e29577ea
font_02_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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