Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e74b3b73bd69e60…

MALICIOUS

PDF

50.4 KB Created: 2021-06-09 15:46:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 55b7bb0d78ee23c791a420153c837e76 SHA-1: 99626537f5ccc30ac441011ac0bdcb6514f63add SHA-256: 3e74b3b73bd69e608d5e85cab016b7c7d4675ebd3cac99c24d84abbf0ec71596
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs, including one pointing to a 'roblox-free-download-game-hack' resource. This, combined with the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic, strongly suggests a social engineering tactic to entice users to click malicious links. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

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.tw/app/431946152/roblox-free-download-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-tiktok-followers-trial_GM835599320.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.bandicam.comIn 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
font_00_sfnt_off00005048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5048 30060 bytes
SHA-256: 0b487a95acf4533e4888132862a2b1d4fc77f005a0b1fb565c119c4ce4e5cbdb
font_01_sfnt_off0000943c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x943C 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA14E 18680 bytes
SHA-256: 4713be9169544f6656b4c8be21c2a58d7eafaa04b5602a230b8b1e84fc41e5af

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