Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c782d1cf3f66d3…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 16:45:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 50a0586d9fe3f8d44326ecbc11dd86d7 SHA-1: c0e6fa7cc644ea231e6596d1d088529c4089a58d SHA-256: a1c782d1cf3f66d3ee42eeea4e9555702beae960b754f6a24c029503a2ca185e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a high-confidence heuristic firing for a game hack redirect lure, pointing to the URL http://netcdn.tw/app/431946152/rbx-earn-game-hack. The document body and other extracted URLs reinforce the theme of free game-related content, suggesting a social engineering tactic to entice users to click the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/431946152/rbx-earn-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/roblox-speed-and-jump-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-jailbreak-how-to-get-free-radio_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-shirts-templates-survivor_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-use-cheat-engine-on-roblox-galaxy_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-followers-and-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/create-free-group-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-code-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheats-for-murder-mystery-2-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pubg-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-money-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021_GM406889139.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_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 21996 bytes
SHA-256: 1138e7b02f28e1c85a265868c87fe32e5d7c0b9d756b00bc02d3b322eed4f78e
font_01_sfnt_off0000606c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 18268 bytes
SHA-256: 9334bec3a56debae64cf6c4f31b2c22e48676996c03ea103fc9d0c4c7125ebda

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