Malicious PDF — malware analysis report

Static analysis result for SHA-256 e515697b1739b156…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 17:06:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 62e978a266b6c7e10d542f386290dd85 SHA-1: 9c7e907a0ca00e380bf3e952d1464612ff1186c3 SHA-256: e515697b1739b1564c82523e7441bcb2c8a6a986fa607ab03a41f0782631185c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common social engineering tactic, luring users with promises of free in-game currency ('Robux') and game hacks. It contains a high-confidence heuristic firing for a 'free generator / game hack' redirector, pointing to the URL http://netcdn.tw/app/431946152/free-robux-stream-game-hack. The document body and embedded URLs reinforce this theme, suggesting the primary goal is to drive users to this malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/free-robux-stream-game-hack PDF link annotation
    • https://razredna-nastava.net/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-items-that-hack-your-game_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/cheat-engine-and-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-bc-on-roblox-2021-no-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-ebay-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-do-you-get-money-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/vehicle-simulator-hack-money-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-2021-not-fake-ral-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-place-rewards_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
stream_002_off00002d87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D87 22336 bytes
SHA-256: 9bc5c8016e06e52a84642789aedc29f9c0f9c71dec7c63f9a9427d2420f32044
font_01_sfnt_off00005f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F48 19080 bytes
SHA-256: 1c6afd9c6a74c9760f64a05e730cb8b9fe2917919de1f03b4396640c76df1420

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