Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef9f262958c2cc2…

MALICIOUS

PDF

40.7 KB Created: 2021-04-28 01:59:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a4cebf87dbaf3692fe62aa29e2dd7c45 SHA-1: d48191035de61e5eee4ab249dfbb4052258f8a8d SHA-256: cef9f262958c2cc241d182ad7024aa66eb98386db86db71bcfb60e3b2c568e7c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it's a lure for credential phishing, impersonating PayPal and directing users to a suspicious URL related to Roblox game hacks. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or exploit kits, aiming to trick users into installing unwanted software or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/exploring-free-rs-roblox-game-hack.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.xyz/app/431946152/exploring-free-rs-roblox-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-robux-codes-2021-pastebin.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-escape-the-labyrinth-roblox-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/hats-roblox-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-hair-roblox-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-play-a-game-that-cost-robux-free.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-stucid-fly-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-shard-online-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/egg-hacker-2021-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-lua-executor-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-its-raining-men-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000438f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x438F 24724 bytes
SHA-256: 16a296828b38d150cb2f053bd950435470629e50f2a8666aa480b61c1dd4290c
font_01_sfnt_off00007caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAF 18532 bytes
SHA-256: 8ed90a13ed80890cefd627e97708902d6c3ce8392c7fdebb2d3f80245348015d

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