Malicious PDF — malware analysis report

Static analysis result for SHA-256 e971a0bf46fd1a5f…

MALICIOUS

PDF

91.7 KB Created: 2021-06-26 13:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b462193280dc44ef06e849826b11715 SHA-1: d3a26c863521b84dfee29309941b714316ac7209 SHA-256: e971a0bf46fd1a5f2b6b6ac52db4d1da16fd25068e482d026a1e8b9351b6520a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host a large number of links, potentially for SEO poisoning or to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://krisoc.ru/uplcv?utm_term=male+seal+point+siamese
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608605667c89b---15255707138.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d39df647c1---88958529144.pdf
    • http://technoculture.cz/admin/upload/file/31395425692.pdf
    • http://jarosi.hu/files/file/78882806163.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/0a9dc3ac7f1d4d775b0d4075a2c88d9f/50543588267.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c36646371---rotalobowor.pdf
    • http://dzbnf.com/upload/file///fobaxupifugizupibobu.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/0824189ce41ae640bfde85e2ee386775/tonolilolatixama.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a80cdb49ca319d1529bbbb809b155e8c/91796817667.pdf
    • http://hart-metale.pl/gimnazjum/userfiles/file/92401722998.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2c0e202655d223713b52c0f0e491f0d0/tudeziwikebijeripi.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/p7k8c1fuurpru09tm3ih69gmm7/32834047134.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/1d57be487adf5c14421624514728946d/lukifubagubitenonaminozor.pdf
    • http://alituncer.com/userfiles/file/pizozo.pdf
    • http://agendatourvietnam.com/hinhanh/file/tefijebozipapuzopetonixof.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aaf62843d---xoteredetexitejasupo.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/b8punho0i7ddvdsdfqvt1toke1/67883909248.pdf
    • http://niezapominajkowo.eu/userfiles/file/pavoxuwodazobixavixu.pdf
    • https://tortugafilms.ca/adminfiles/file/50689460983.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/kom16qjpddsgoqs3ohfk3986hl/19539241496.pdf
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/degunemavelisagi.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/4b0c31b595699569607d467d98319b9b/73075812087.pdf
    • http://dioceseofniranam.org/userfiles/file/tevuseponaragininopozode.pdf
    • http://sfera-vlad.ru/img/file/24558544819.pdf
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa12d907641---8637218064.pdf
    • https://dichvumayphoto.vn/webroot/img/files/volibasetefiz.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efda.bin
c992b9a8ced817d6881f065ae74382dfab13ba339662996499dfa91016ccedd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 16740 bytes
font_01_sfnt_off00011b68.bin
17dab69886bbd3ec2a6b7f0b1d65c3601f0d4afd9e3fe3dca6a26fc3206f9cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B68 16520 bytes
font_02_sfnt_off000131eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131EB 16792 bytes
font_03_sfnt_off00014a02.bin
45792e64162e6e66b6c54dd78df885bb3bccc0e4a9827689cd7c432a8e2d33e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A02 10304 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.