Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d9e3853ef7806b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-16 21:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6eb4d7297c44a4a842359b3ec9e44c91 SHA-1: 552f1387530de45a95544f266ed8a240c4018f08 SHA-256: 00d9e3853ef7806b9c49029852fe3c0f4d90294d11a27061a265d68f3448f60f
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://queure.ru/uplcv?utm_term=vidmate+1080p+apk PDF link annotation
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/32007251852.pdfIn PDF document text
    • http://spiregene.com/image/files/20210903_054416.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/f1bfa0ee64676027b65988c0a8ebb687/39273986669.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/dudatifufiga.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/pebizefeleriw.pdfIn PDF document text
    • https://baglab.pl/galeria/file/fagosuterobagukepunaxemo.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/rudafifubojamumunogaz.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/24843637823.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/e3496d887abbfecde01cc3026454522e/vovopememikusorevawogox.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210910_70E6F7664AAC2E2D.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/xakorulogaxopixowikato.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/31758600805.pdfIn PDF document text
    • http://markaz-e-durood.com/EditorImages/file/68235313868.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/11850829451.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/ruvezorutobesozigokaxuru.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/54612964830.pdfIn PDF document text
    • https://soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/89073287717.pdfIn PDF document text
    • http://epplast.com/files/file/vudesagosazoxuzuzen.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/7992826294.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/55580143605.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/39044586703.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/wesobuleputemakas.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/33595775513.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/6087902361.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/605426985.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161346dbb173b7---tizavuwojatozozuj.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_off0000d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 17888 bytes
SHA-256: 1f845a92b495afc103d3271b6b6b92a20fbec284c421476c3d18c716ec80906f
font_01_sfnt_off000106e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E9 10460 bytes
SHA-256: a82e65c5bcc98514d6c8e5c05691cd1d5b12652039519df067b3d955ac97be3c
font_02_sfnt_off00011ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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