Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca7bc717cb2faca…

MALICIOUS

PDF

43.9 KB Created: 2021-06-11 10:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 899da9c9c137a80081f1ec2b165a5b5a SHA-1: 7e9eff0ddbdca58c2cacd68c30d646a003e6f42e SHA-256: 3ca7bc717cb2faca8d4a4a8c346a63577d87e2b465389770557682357c99099a
122 Risk Score

Malware Insights

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

The PDF document contains multiple links to external websites, one of which is identified as a 'free generator / game hack' lure. The presence of a fake CAPTCHA or human verification prompt indicates an attempt to trick the user into performing an action, likely to download or execute a malicious payload. The document's content and heuristics suggest it is part of a phishing or social engineering campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/robux-hack-inspect-game-hack PDF link annotation
    • http://elibrary.uniyap.ac.id/repository/gear-hack-roblox-building_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/addrobux-us-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/games-you-can-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-free-2021-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/hacker-tool-for-roblox-download_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/cheat-roblox-traversed-wall_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-robux-pastebin-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-scripts-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/hacks-para-roblox-mad-city-wall-wallhack_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/cheat-engine-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-fortnite-dances-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-form-farms_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/hack-roblox-pc-aimbot-download_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-hack-script-python_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-hack-granny-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-free-robux-codes-for-ipad_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/get-robux-roblox-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-free-accounts-giveaway-and-tradings_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_off00004ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF1 24628 bytes
SHA-256: b292f8d723442b7e72ba14dc8b3d0fe46c37d131a4db90d18d22ac2836ae4ae5
font_01_sfnt_off000087df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DF 18528 bytes
SHA-256: f01f70f45adbb75b033c503fe868bdbbb9f20e40816dc62093bb4f1be9354a5d

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