Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23342ed1da9a23d…

MALICIOUS

PDF

72.8 KB Created: 2021-06-05 06:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec7e839ed96696c49791d450e4bc0de2 SHA-1: 0c6b63ac8575ca84d268a87718db646ddee63a4a SHA-256: e23342ed1da9a23d0c788a2ce8a2aa83f317dc743f859f68328591020ec227c1
196 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to compromised WordPress sites, likely intended to host malicious payloads. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document instructs users to download a password-protected archive, a common tactic to bypass security filters. The embedded URLs suggest a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pixomot.ru/uplcv?utm_term=como+hacer+un+hard+reset+samsung+galaxy+grand+prime
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b55aa7d554f---kijarasonabifejasulojix.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d86695e3d7---92008485609.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb1b14a790---62106188078.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2972f35f0a940eab322d2ecb31b9aa3/sufezopowoxezusewoguvur.pdf
    • http://backkwang.com/userData/board/file/vagiz.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/8c1db3680976cf1a7fe7e439df531e82/vunigabiwo.pdf
    • http://bodegaadrover.com/userfiles//imagenes/gilawizifotadofuzafafunuz.pdf
    • https://manuscripthandler.com/userfiles/file/9176067393.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608af39ea6609---pedunakafefefikuxupofezi.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/hv9kutjcufn74tt1a5muqaugj3/guwowi.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092401292de9---sujozanikujo.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/7830526e4df047abe782600218c91acf/welololuwogarafeleka.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/0530f26e13cbcabe1fccc3d806840d08/67241961902.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbade9e746---12850538044.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db84.bin
5dba10a4b02a7e7d5d1a14212eb7b8111dc1e70cfe653ab638905a16dc46133e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 5560 bytes
font_01_sfnt_off0000ee4a.bin
7197a0aad801b9e34cf76fb5477a56a66e402489fa643037882770670d633de6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 11656 bytes

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