Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26e7eaeb71fabdd…

MALICIOUS

PDF

115.4 KB Created: 2021-06-17 17:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a0dc07029dc0ab2903e752104c21f188 SHA-1: 0d718e23cc8d95ed117cdb70e430f0c01c16ecaf SHA-256: b26e7eaeb71fabdd0fb9401e00a910dfbcaec773bdebed6898f8218d68e6243f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://irlanc.ru/uplcv?utm_term=what+episode+of+naruto+does+asuma+die PDF link annotation
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e907697e28---bakugalaz.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16095f71715551---78842013250.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/6a56889c0d47c484571bbb9e876e6ad8/45247917634.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/50020542599.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/borovepupuzizopeteduwu.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d4fc61e16304294d092a49e2067ea5c5/fajapewuzuva.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/08ad52f74f1ea15554f4b7e73e56e273/golujixonusagaz.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdc9a72be5---fetik.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/avhrtu7oigued7shal2bm866n3/28671655577.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e1b2a5b1128c8b1ab05ddc47e79e09b2/mirodiwisijevozapimomoneg.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/f3nt70khfvc5nuevvedgoaq3n5/subito.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/1062697275.pdfIn PDF document text
    • https://atl-50.com/files/file/sopetomoxunuzajibevo.pdfIn PDF document text
    • http://sam-global.info/files/file/39113361907.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4ab97df5c---zogaxudogoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000164dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DC 9456 bytes
SHA-256: 926570fe2acf244ef57e209573bb7eb475197bcca09026f62723a5a2981a8ea5
font_01_sfnt_off000184b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184B5 5264 bytes
SHA-256: 5e88dfd3c108c98f008ea7c6928a15954894f5baa6fd3826a517904f6a865401
font_02_sfnt_off0001967f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1967F 12492 bytes
SHA-256: 09b4e7b9fecaef3c8e2513633e018dbaf7682bd44ec9fd1a014ce32b0e104610