Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64ea10a65c6815f…

MALICIOUS

PDF

454.2 KB Created: 2021-06-14 10:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 270c495611c7c0c35bc7b22c90ab43e2 SHA-1: 9e36497caf1577c862bb2b8e14dd4ca98371cbba SHA-256: e64ea10a65c6815fa6366c49f338dfc14e43abea73aa63ded552879e746333b3
126 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9000

Heuristics 5

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=leisure+bay+spas+celebrity+owners+manual PDF link annotation
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/d08hjflu9ijgghl8vsle29j4sn/kejanojuxebivebowajen.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/a4c134efecfca9547b047c42a80085b3/2731083036.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/55579823585.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160899af01601e---vewidaxexoli.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/xuvurenew.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607878dc650c0---76345023223.pdfIn PDF document text
    • https://chp-travel.ir/data/file/34937061494.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l9qrt5u324tv7h7kbsqd1hbeu8/27649534304.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085ebf1a45cf---52023801332.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/59361025186.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/tiwobikixupogix.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/76226304650.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/408f737717f52399c53ad180c03f0a84/15403389211.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/b7b82fb7d281551cbe3ec43aaace314e/mevudowupigevetivaw.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ad0855679---vapotusukab.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/76787268000.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/c274b0e109090532f718186f9ce44691/33821826128.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0006bb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB55 5236 bytes
SHA-256: 3ef5b9e6d1f508a34dd152080f655eddb8e99a1dc7d688b84e17b1a6d98928fc
font_01_sfnt_off0006cd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD16 13216 bytes
SHA-256: d8c50c39c881fefc2b067f635a6d0fc2ab928089ff2aa8fdc7df723c3bc4552b
font_02_sfnt_off0006f821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F821 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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