Malicious PDF — malware analysis report

Static analysis result for SHA-256 065dc1e085a9afb3…

MALICIOUS

PDF

73.7 KB Created: 2021-09-12 08:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: d861fc5e6ceaf2927f9dcd45ea7c7c61 SHA-1: 59e0f1b941c9e08be46564db5011deafbef98e9c SHA-256: 065dc1e085a9afb35c8efafe35ffb60e97e85434ffd6f3968020e304d4bd8966
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The presence of numerous external links, many pointing to potentially disposable domains, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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 http://wcsps.com.tw/ckfinder/userfiles/files/lebojebatesusisuf.pdf In PDF document text
    • https://drrajanmahtani.com/userfiles/files/pusurawijukeko.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/lulokakagenagekisa.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/95207884629.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/lerowemexos.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/tubaniriwat.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/redelexozifiladeruna.pdfIn PDF document text
    • http://zamgph.com/uploads/file/051232392894.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/wedijagutizubapo.pdfIn PDF document text
    • http://only-svet.ru/upload/files/bupokuz.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202194949556547.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/70308482234.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/84273723667.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/65730384513.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/18087083181.pdfIn PDF document text
    • http://spharma.ua/files/file/7811951754.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/nenopimujesokeluze.pdfIn PDF document text
    • https://ever-progress.com/upload/files/zesuguge.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/6096014529.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/wuviremesuxo.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/48845271887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=mario+party+2+n64+downloadPDF 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_off0000bc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD480 10644 bytes
SHA-256: a804680188c2eefc79349d5ebd6dc023d2e2ada8c6db12de6a4a161a5e6f0149
font_02_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 17116 bytes
SHA-256: ad6ffdf94f56f8a1ecf744d0fd1a13bfaaaf98a33a72972466190ae64c763641

Open this report in the interactive analyzer, or submit your own file for analysis.