Malicious PDF — malware analysis report

Static analysis result for SHA-256 f705ab1bf796c00c…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 17:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 90ea2d1c51f7cc065f492fd217413eea SHA-1: 1afed0a239d7a3f473c9e9d1817c6391c8bfc22f SHA-256: f705ab1bf796c00cd39d2ae1bbe921794645426b0f892aa703fa57b996d49228
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://irlanc.ru/uplcv?utm_term=wise+and+otherwise+full+story+pdf PDF link annotation
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d19b0b2f2f2---jilubupanepigedogik.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b61bf9800e---zutegerifebumufe.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0e23cb44ff7368d3c4a7e9519b3b6fa1/pomodifiworo.pdfIn PDF document text
    • https://t2sc.me/userfiles/3090141980.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161029496cba6d---wuborizaburigabunaka.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/22489125928.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608104bc905ba---wigomaneze.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/63868121088.pdfIn PDF document text
    • http://domainecomps.com/documents/files/55388035163.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/burusu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160924d3d2427c---poxekagesovobet.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/zisapijawewedexukazox.pdfIn PDF document text
    • http://santehnika34.ru/images/file/zudexinevelarorajar.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8320dd09c---41432317469.pdfIn PDF document text
    • https://ghnservizi.com/file/tepawosaxopegivofok.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/17829859035.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9015ebe220---80509369795.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/da13gqotg2scbelj5k4qbfp3qe/madawon.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/suzixowizedareneb.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/xusamowivowevi.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/6412722019.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/48056458033.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_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10769 17468 bytes
SHA-256: 3f29d1a3216e40564de4e4f6cd8a45a3b96a162c83509bb0813118aec7728a0a
font_02_sfnt_off000134c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C6 10888 bytes
SHA-256: 09096cec2eed28098062ae7c7ef19e2965a846ae82e44146bf3bfd5aa91269f5

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