Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e0ec18c6d4622d…

MALICIOUS

PDF

88.4 KB Created: 2021-09-02 16:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f86bb968215819df725e45df3d212e9e SHA-1: c9589d0ba248d14126a35d35a32c17e28f0ae11c SHA-256: 94e0ec18c6d4622d2f515a5e30e4e683d97158ab2c541105fa8e1dadc6106cf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://nomylo.ru/uplcv?utm_term=converter+em+pdf+x1a PDF link annotation
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b56f82fc902364712f78102cab217ad7/24463341211.pdfIn PDF document text
    • http://newcityhk.com/userfiles/ravurugumajapaloxaxegus.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/wonabad.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/54385978460.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/zelazimoxopabiwinik.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/gosebexej.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/a6esp2u900itr3fhj2gd723gj6/99192168314.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/fudanepepe.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/14788147460.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160851d6999258---51403807879.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///zivogirumotubiw.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/73111776343.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/3702391888.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772541de32e---bejiw.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/kaxapupofesifufejitu.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/68359539319.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abaffa72444---falinojafotaxepude.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///90260367990.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/9036937760.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611954bcc28a0---sekide.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/70772540121.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092818186aa7---92191841832.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_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 10604 bytes
SHA-256: 03d574f6e216a5e2fac6cf6b31e9610c233364652a5aed2b961f1ab75528212b
font_01_sfnt_off0001066c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066C 20088 bytes
SHA-256: 465b84e42374632667a9cc469d9c248ab37c3ec476703698ab93741b2c64e411
font_02_sfnt_off00013bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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