Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2741817010880e7…

MALICIOUS

PDF

93.6 KB Created: 2021-07-31 15:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ad79b0eb33fb01e0d5ae80016b869cf SHA-1: d596e4cc49de94b9b3ff5d843b40ab889fd0bb5b SHA-256: c2741817010880e78500149178ae370e06c982708429250b825d67cb73e87920
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or a trojan. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=muhammad+the+messenger+of+god+full+movie+download+in+bangla PDF link annotation
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160874a8748048---vujefelubelututuvajiz.pdfIn PDF document text
    • http://etre-belle.su/images/file/7992850765.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160e18bdb3403e---lugap.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d10c2b7a27---85224184069.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c1c9daa8c---nimujewupipoji.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/66761507949.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3b3e32a5689edf84b7ea3125d25f12af/nefujidazewadake.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/zetixotajaligofaroti.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/73447981838.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e46da3114a---44309980776.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/26043326613.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/a43501f0d4ab98ce8879b763f3c1d38e/87376983363.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/xolajokopimefixakuzor.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608472c05f057---68413347959.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/41530371555.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/lafizajomajulipij.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/funewewisewug.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/jominipesematufiletu.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/wuzapajavizokevunoramov.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160869fd9daf51---tasemopiwesewogudib.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608400c72016d---bewezidovij.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/0dfd894402a20aff3270fdb0e679b3a5/dobagejunidofapikasafurer.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47fbec6a90---68599408699.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/jujunu.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/bfb86af950f3708396c530c83f59e91c/tejaxetu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1d23ec6b0---22056276007.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_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 17356 bytes
SHA-256: 27118c103741cb118a5c3119d69d3d73fc5215ff52fe7f6b8f4325d822ddc450
font_01_sfnt_off0001334f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B66 11184 bytes
SHA-256: 7e13644f716f70b094b6527f1a5cea03123e00b9fc53ba3b8bfb73844d222249

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