Malicious PDF — malware analysis report

Static analysis result for SHA-256 2866a404c58a1a55…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 07:04:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 24b60042cb60d527409d3cb4f42b569b SHA-1: e5cb21167d40f8f37f09f01804311928627d4ebf SHA-256: 2866a404c58a1a55fb6c8230f83f7025b3033ebe0ef19f61d6cd70097b6084a7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure related to 'free Robux' and 'game hacks', indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The primary malicious URL identified is https://netcdn.online/app/431946152/free-800-robux-game-hack, which likely serves as a landing page for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/free-800-robux-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-stuff-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-gg-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/tiktok-free-without-downloading_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000524c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524C 27444 bytes
SHA-256: 5c9d1467c201d3d90b2da14a4adbb1b72422d10e8c900e55c68b9c75745945c2
font_01_sfnt_off00009248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9248 2812 bytes
SHA-256: 869414959d7b492e0f799b560e1731e3ab498bd286c28e9f0d2ec33d9b6cf53d
font_02_sfnt_off00009be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE7 18396 bytes
SHA-256: 2059a7894931e9b75336f5975f03d939213f3fdb926ff7d6db67df9fd1731cb7

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