Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0206e86264a38b…

MALICIOUS

PDF

103.9 KB Created: 2021-07-23 11:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9600765eea2bbbf60211381d7f705c74 SHA-1: de84339e7a585a3046f9bdc1b685d45099d498bb SHA-256: 9d0206e86264a38b85d99911430e3e7120c5e0ef0356467e22605f3adcce91d0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, many of which host other PDFs. This behavior is indicative of a link farm designed to distribute malicious content or lead users to phishing sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e98aae6a99---59643672808.pdf In PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/070121b428e5b1e5133bedebc37be9e1/xatadediguzivofuvegaliw.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/ronadirani.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609171085921f---66130530535.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/t9fd5crt0pbp090v4hk17dsc6u/numujigutud.pdfIn PDF document text
    • http://moristas.com/userfiles/files/42394291689.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6ccd1c27e---84899927642.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/70615356490.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a947a8c7ccb---30650526362.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/d761532e8e89273794672bfc7901b8a2/womobeworesazig.pdfIn PDF document text
    • http://castel.lu/userfiles/files/18645756177.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f18f4a494ac---12045443002.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9b88a8e2b---darufabanarilafawedeloli.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/deferukufitagigejawepe.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/189c2605c360b3f607b52ae79a8205cd/mofaxom.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c50ad696104---fajuvapozov.pdfIn PDF document text
    • http://yilip.net/userData/board/file/45688506166.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/sazaj.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/61677372743.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/91949884842.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/93853848894.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/33223843838.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/xekajetigusozet.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/danerulibugobufaxifavoj.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607695c8795c1---lavejemumubezexin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=latex+tabular+multiple+pagesPDF 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_off00012ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000146ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146ED 10672 bytes
SHA-256: 7583c743bce447bfd48dcf327cf1e615f1f7104735ac47cebdd88a46c0185782
font_02_sfnt_off00015f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F34 18660 bytes
SHA-256: 65e997eee2c0ce04a1ecb5a18e86821c57c5eadeb8a153f0e96df7c453539f81