Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2f34eeaa10cef4…

MALICIOUS

PDF

79.5 KB Created: 2021-08-30 04:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ccb97da1115dbcee24341af3a208ed70 SHA-1: bf8cc28fe5addddbe740567f54c4be8ce9e0a9da SHA-256: bd2f34eeaa10cef42c0a583b257d91500c8f3e652e9fccb8c1e0b50a19af8fd5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead the user to a malicious site or download further malware. No specific family could be identified.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://netiko.ge/img/Data/file/piler.pdf In PDF document text
    • https://locktactyuma.com/userfiles/file/39904023454.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608388bf7100a---24864478694.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c0939dd76db93ff100969d4daaa51eae/12261047635.pdfIn PDF document text
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/60979612986.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/sobakazezokabibadivubazox.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/89938340774.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a94115184d8---xizosen.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/pl7fsvv8rjrvuv3qnduvpn2nam/garemugu.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/mojan.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210719_AE305471ECA4EC16.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/zejukenuzamimafaluwo.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/nigomeligarowevamadasote.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80347be58---doxew.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/34802302455.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/89373590101.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/41109894781.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fec0fdbcf3e---xinit.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/7055546806ecae1f781b7f4b1fea1bae/87630231559.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/7c14d0c102500b234f4e38a365c84c09/63074657457.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0046e2578---nofejos.pdfIn PDF document text
    • http://moawin.org/editorfiles/userfiles/files/nuxasuv.pdfIn PDF document text
    • https://akvaguru.hu/user/file/kezafiruxev.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b7add063c65acc41515e8a4df5db2751/81870835949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=list+the+renewable+and+nonrenewable+resourcesPDF 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_off0000d157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 10752 bytes
SHA-256: e465475c7893d3c6ae0757e01acd64f2c85f316cd42f0f78d0a35c3234cd83b9
font_02_sfnt_off00010226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 17872 bytes
SHA-256: 0726e872ff3ce9fa36f1098eb5948ce974a950dede45442d9844a77ce76ad135