Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a91be61a5be8373…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 12:25:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e389ca11dfb8bb15c2b791b8f9f91a5f SHA-1: 1b2abd4e13e85e41c418620fa23dbbdfce15ed53 SHA-256: 4a91be61a5be8373138cfa6e9b04580d6fd36a35cd59b4a52be692a1ddd4a448
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link disguised as a game hack generator, specifically for Minecraft and Roblox. This lure is designed to trick users into clicking the malicious URL, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the PDF's structure and content align with a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 http://netcdn.tw/app/479516143/how-to-get-minecraft-pe-for-free-game-hack PDF link annotation
    • http://vetmed.fkh.unair.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/earn-free-robux-online-no-survey_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-robux-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-stuff-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/robux-hack-no-survey-and-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-hack-money-in-any-roblox-game_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-free-lambo-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-easy-2021-december_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-face-codes-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E2 22468 bytes
SHA-256: b98f3cad872254e1b123008f6c6722b7dcbfbae1796295be423a1b73aa57bedb
font_01_sfnt_off000063c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 18316 bytes
SHA-256: 6114a01aa91a9ce609c62e178085c324d68f94fc89260c1d3226e785dda6fa61

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