Malicious PDF — malware analysis report

Static analysis result for SHA-256 a006d84ba2ceb927…

MALICIOUS

PDF

79.1 KB Created: 2021-06-10 05:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09668229caf53a554f9d96850543f4bc SHA-1: ab36b3997c331a7e006743282dc13b6341ac0f0d SHA-256: a006d84ba2ceb927e009a21c1fe64cf0b4f2725e870c100976da7601cd015220
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://infrive.ru/uplcv?utm_term=tamilwire+ilayaraja+hits
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc6de555a9---23533799989.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/xufexavumipala.pdf
    • https://actorconseil.com/files/file/denemopekime.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/52b897694a4de06f1b57381157a61000/fupawomukivenirinum.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb2972960---37964064842.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/jpgudvp9cg1b1bjmr7sfk7k794/wixitamuvi.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/24659845703.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/148859e89ee55b12de9f6e0ebe99b142/14200021502.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b29e14c11be---merokegabanizo.pdf
    • http://langfordfinancialservices.com/userfiles/files/bonugigafikifanogumelimu.pdf
    • http://sahrugs.com/userfiles/file/vusanaxaxipegulos.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb37ba3971---sefugumuzifoxule.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/343541ff0c95994bd34b2e81f1967bb0/17941012236.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608019a27bdff---11585995396.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607539d0c4046---82527922168.pdf
    • https://implant-drill.com/userfiles/file/67801718664.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a931e1143b8---lujofusu.pdf
    • https://alrukn.co/userfiles/files/74273603177.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52b.bin
97bcd7b095129e20a53737aeacbd90229786208261e4d87d3ad6a478e841a780
pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 5144 bytes
font_01_sfnt_off0000f690.bin
13f3a82a4bc7c914d497e1d55c18a05c7f14bafea74ed01ab6d67d87299e7def
pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 3500 bytes
font_02_sfnt_off000103dd.bin
db07e9ade5a010251f57f8c0f8952e3efd8aab7feb91d325395488f352292e1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 13300 bytes