Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed3488f973c3e9a…

MALICIOUS

PDF

33.6 KB Created: 2021-07-08 21:46:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4a023ea860f18b8f3caac0b42251e385 SHA-1: 99f6ed7f2defa437cb542f0863ef16c67caa077d SHA-256: aed3488f973c3e9af00942b2f9c7962becbd835d8e71a515eb951e92e6e21e22
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a prominent one to 'netcdn.tw' disguised as a game hack generator. This heuristic, combined with the ML classification, strongly suggests a lure to a malicious site for downloading malware or phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

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/toolbox-for-minecraft-pe-ios-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/apocalypse-rising-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-dominus-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/boku-no-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-cheats-online-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/bloxland-where-you-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/wie-kann-man-bei-roblox-geld-cheaten_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/elysium-bros-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-tower-battles-cheats_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-any-roblox-game-no-downloads_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacker-roblox-pc_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/troll-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-rescources-no-download-or-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-using-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-make-a-private-server-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-pet-simulator-free-vip-server_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_off00003035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3035 21756 bytes
SHA-256: e32eadb04be03b119b3ad160987489c8c047aea84a1148def5cf773f11781e92
font_01_sfnt_off00005f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 18592 bytes
SHA-256: fecfbe307641de512b59b5989f2825d68be9e1756e870c3e96e7a472ec53942c

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