Malicious PDF — malware analysis report

Static analysis result for SHA-256 92085a3153e57cf7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-06 20:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0078d68062fa4f56535bfc8955ed044c SHA-1: 01169185ffccd3f766ddbea0b9125e0254460fa8 SHA-256: 92085a3153e57cf73dd2e49d2d41140137252da8572cecdcf3881b60317e2be4
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary purpose appears to be directing users to potentially compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://searchlink.org/userfiles//file/64027071917.pdf In PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/r3irlhjadjim6k3s4fnigusnd4/89846849292.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2373b88e8---pukoxa.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/9236b2bf47c1f6807b820e94644b6c97/makoku.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///74621961731.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/62731602222.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/nejiwoxipezemawelod.pdfIn PDF document text
    • https://claudiodituri.it/uploads/bejirutazofegiz.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/84530318342.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/fakazejewasol.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/ragomenugumafigire.pdfIn PDF document text
    • https://larioenergy.net/uploads/file/31844367702.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210903005353.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/juloxasafurubafisip.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/593rn5htec7qd57uokbceobt34/36413083808.pdfIn PDF document text
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sekoneduzupar.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/kowuxafanogolojigefogo.pdfIn PDF document text
    • https://fptica.ru/images/file/86498810326.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/52262924376.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/d001bceaf589c97e308e7b107cebb644/46246031062.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b83ad1446---50151759363.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609866e107878---rifudixusosomezeboxokaj.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/b86endoecf2nq9jr8ings3ob7i/mufodapobibi.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/tto3efeligs3e6gt6j4fp2t445/simuw.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e63064e96da---9263055525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=redigera+pdf+adobe+acrobat+proPDF 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_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CE 18612 bytes
SHA-256: cde6c27a7120d2efd687037fa291888db9c389bcec7e1a892e5e2497dfab1bdb
font_02_sfnt_off0001232d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232D 10660 bytes
SHA-256: 9241c5553c9a73ee020360835a319ad42d34e4ec720239a85bff66bac3697713

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