Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2ccd7e2e1f5d65…

MALICIOUS

PDF

98.5 KB Created: 2021-07-05 00:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d251f3131bb11de9efd44afcf5e2b609 SHA-1: 9f08925385755ffe5bc9855eb208d679d1ccb8d0 SHA-256: da2ccd7e2e1f5d65e32b4ab6ae59f6b21639d8f9c736d9aa0cc80bdb29c7fa47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external URIs, many of which point to compromised WordPress upload directories and disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://panama4d.com/contents//files/xatapajazotaxa.pdf In PDF document text
    • https://handientu.vn/userfiles/file/dokapolapuzawonekebewa.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5633be0311---kobudapikogazukexosis.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9856813791---88799479597.pdfIn PDF document text
    • http://carefirstyoungatheartgala.com/clients/b/bc/bc61c41cf33a111e4089ebab1e34a2ce/File/zizifad.pdfIn PDF document text
    • http://padgettlawreunion.com/clients/79772/File/zedireb.pdfIn PDF document text
    • https://p87.hu/files/parabafikelomulebug.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/72hrbbs1c8ngtiiamqt2o2uou2/98462643178.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/5763d699ff5ffa2d9113f65371c7e121/95646738012.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/33502457750.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c70071c66f---degedexilimuvatupodota.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608082e26581e---12164986434.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/c7ac709db77fc72a8b91f67cb40c238c/dovez.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609484b1f2c43---ruparerovakizelaniwibobu.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/zururat.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/77582544974.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d66016115e---8291373010.pdfIn PDF document text
    • http://candientuvibra.com/images/file/37192503622.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/eca66431a4ea46fb3e16e6ab375b04ca/vusozuvipumozu.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/80gngi733k19fqf4512edbsnn1/munovaludepamotexuvat.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/xinaperu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c569567c3ad---67007957124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=jesus+the+high+priest+in+the+biblePDF link annotation
    • 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_off00011e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E89 10480 bytes
SHA-256: 0d4c016bcbb1e8172e77a72c26181c231fd4097e024d722e22068f1ea7804d1c
font_01_sfnt_off00013610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13610 17916 bytes
SHA-256: fa77b41f82e04a7d003e81526d99fc94b6d5c01efa73d90d0102abc06655c88a
font_02_sfnt_off000164ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1