Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b168a12cf64f03…

MALICIOUS

PDF

79.4 KB Created: 2021-09-16 13:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b939c8a799168d075d3134acbe699a9c SHA-1: f5b4efabd2eae9d18539274f4c1a8e35811588fa SHA-256: d0b168a12cf64f033c87fb9e8b31c7248c04a8a62382b4379d9bc4c149e7c691
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded links pointing to various domains, indicating a link farm or redirection strategy. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document's purpose is to direct users to potentially harmful websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://oniceh.ru/uplcv?utm_term=river+queen+full+movie+online PDF link annotation
    • http://fotografiafrancescosomma.com/userfiles/files/74606089371.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/98380675715.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/71831758132.pdfIn PDF document text
    • http://npas.ru/pic/file/momenuzufozunepijuvox.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/16808833448.pdfIn PDF document text
    • https://506hlapeta.com/files/file/guzefen.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/41502748724.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/37603770403.pdfIn PDF document text
    • http://jr.ac.th/ckfinder/userfiles/files/nonumadapiposa.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/mapekodepaganujotixeve.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/xidugivoletibutipok.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/52482356992.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/kudoduf.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/26065270685.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea63e64c2f---rivarebanesirulejiwegazok.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/83219444544.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/gapobalikizixuk.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/bipaninetib.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/majiwudaperojenig.pdfIn PDF document text
    • http://www.cpiequipos.com/assets/images/user_files/files/38361112859.pdfIn PDF document text
    • https://fuze-pay.com/ckfinder/userfiles/files/tewovem.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/52697144417.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_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 17272 bytes
SHA-256: 417da1882d1e3861ed710edf0fb0f9a285b975331965c62f09209767212046c8
font_01_sfnt_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11920 10304 bytes
SHA-256: ff047a33575f3511a13fb8bfda1be202da355108d97594818c8ad197b22d4376

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