Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f708cf51a6974d…

MALICIOUS

PDF

81.5 KB Created: 2021-09-19 20:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 903c216700ff3926e393c20ad188faed SHA-1: 7809c797b96627353a893414870b42a9e0b293ab SHA-256: 02f708cf51a6974d33b8b55e112b8da1a156e3f308c7b6e57c44ef5143636d82
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=the+last+airbender+2+full+movie+in+tamil+download+tamilrockers PDF link annotation
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/1d6d7110a47696230d28c7672dbf9fa5/11486696535.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/81125677160.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c19d924e34---14931813958.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/zakefolizevusovozubafuki.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/29629712179.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/79410571910.pdfIn PDF document text
    • http://yilip.net/userData/board/file/71433741744.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6f452e10---nusurup.pdfIn PDF document text
    • http://contextuae.com/resimler/files/9966710491.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/21358892826.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/suzetepod.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/vemajevumelo.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/jawugiwevokosofepogo.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/davulezotobiwuniwemo.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/senikafiz.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/zalixonide.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/91250558205.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/86024893680.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/mezojemeva.pdfIn PDF document text
    • https://awinresource.com/uploadfile/file/zomuvesukisonepug.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/95694770321.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/zikilibeg.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/80233663881.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/sajat.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_off0000d804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD804 11308 bytes
SHA-256: d12c99d0c8400ab2ab388851fb9b111cda2b06f925b4bce645679c8b6f9068f7
font_01_sfnt_off0000f284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 17364 bytes
SHA-256: f77081a9c57223196d8fccf90169ed0df34294a10e92e4a0ae096f4cd9e8bf2e
font_02_sfnt_off00011f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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