Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b0bf02b3be8982…

MALICIOUS

PDF

95.0 KB Created: 2021-06-09 16:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 90c30140d30d0d9de3b69ffaabde7876 SHA-1: 63cef6e41e827a6e71f3080844c8520ad4c5f28d SHA-256: 64b0bf02b3be8982c7ee300f7d0ed1f8c8f46c97cbd5b057563f8d260a3cbf35
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed for SEO poisoning or phishing. The document body, though heavily obfuscated, appears to be a lure related to a movie title, aiming to trick users into clicking these malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=muklawa+full+movie+punjabi PDF link annotation
    • https://audit-advisers.com/userfiles/file/rukuv.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/kejedasavujubinaxi.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9fb0aef7c---84790417795.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/92eec26c4226f52a18c70257753ae6d6/ratavizol.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/72426429971.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abae6c74f0f---97809575978.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/wejipeluvafi.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a691f283---bibupixumujij.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/godokino.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/vekilevefidomizej.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b27fa18bf7---13744002069.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/873079c6aada0ccee32496cfd24c5a8f/rowedifebozikezel.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/50986404519.pdfIn PDF document text
    • http://bscartridge.com/pic/zipuxobowisiz.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4a80632fc0f7cc13ce18d0727fac02d4/nanetubewubelogaf.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
    • 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_off000116ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CE 5212 bytes
SHA-256: 9ef15bcbf4bd7bca5e2bce1d3425bb5d41dfc306a4f5881f3d0ced16f0a7a4ca
font_01_sfnt_off000128a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A4 12676 bytes
SHA-256: 973f550aac9aba982e449f9fae81ff05ebff7539e099fff8ea850feb6bdd42e1
font_02_sfnt_off000152a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152A3 18132 bytes
SHA-256: 421b0d2bb2dd5aa59a182abfb152424ee4119f3c7d56373e864afd2d00a7e820