Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad74f9f9fca6fc3…

MALICIOUS

PDF

98.0 KB Created: 2021-09-03 17:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 273f5ae78ee93e61d8c04d962cbbddc0 SHA-1: 26d11126defc140b8325173d43ca5e8e00d8a3d4 SHA-256: 0ad74f9f9fca6fc31a9a6620c8623275031ec75400b93ac71fb582c165b1aa03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the sheer volume of suspicious URLs point towards an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://garglob.ru/uplcv?utm_term=architectural+lighting+design+concepts+and+techniques+pdf PDF link annotation
    • https://psg66.ru/admin/ckfinder/userfiles/files/riwudenuduwi.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/8mhutsbuc3gm9p9d7vkejgj032/farizesivitatigaxijoxit.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/kemisoguwapakogubenema.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/6544531138.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/lmm9doqc7vekr58bt8ssi5hmmf/98591629339.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/8ad24110a533c2613cff2e24e70de3f7/77454772720.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dcc2a6153---24150305362.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/25590673735.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8ad37896ae19f89deaf1ac1cc82be0c4/4643543464.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/37060379299.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/hjqutj17o9o77fjvv390lq5mm5/pofamiwipidenaruwol.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6b5a77bd232e08d5d345fe353f8ec17f/97161006848.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/107b3b80e06f3e7a661af104d3dc9c1d/50996612154.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/sutojum.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5731e688c8---25813477295.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b22a32a7704---8249819250.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b1c72b358---tizerazijanisavavi.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/94db8b4660d4a47efe068ae059951350/salutagifexarakuwazin.pdfIn PDF document text
    • http://jarosi.hu/files/file/gufef.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/44469053f0f4da65d112ae7f977527ad/baduga.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/73021438817.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/19067719638.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/14857202736.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_off0001184a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184A 18288 bytes
SHA-256: 81b5b9b62ea32b9360232f6d2dc8c3ec97a0e2497b2a1f09ba691cd9d8debebb
font_01_sfnt_off000147f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001600d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1600D 11128 bytes
SHA-256: 3344d6d37a5e8ba566a4abb143634aaefd702f623d520727db790c86ef9a385b

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