Malicious PDF — malware analysis report

Static analysis result for SHA-256 df92936f65be53c7…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 09:12:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e5123b310ca20bbb137496038930b2cb SHA-1: 52471cf4bb73e55d2303c1c55a9e922e1a0dcf92 SHA-256: df92936f65be53c709cda3f5b6708bd433d524cfc7c3ca61dabf80920a846ae2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.tw/app/431946152/using-cheat-engine-on-roblox-bloxburg-game-hack PDF link annotation
    • http://vagency.us/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/robux-premium_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/coin-spin_GM406889139.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-free-followers-and-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://vagency.us/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://vagency.us/images/coin-master-time-hack-ios_GM406889139.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_off00004ec4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EC4 28408 bytes
SHA-256: 9bed53b1859a0ab14edee050f3e31d9c120ac6aab8ae08f8b3f9e26559bdc557
font_01_sfnt_off00008da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA9 4088 bytes
SHA-256: 47b0761d4215e86cf8160ab4358b49f35bb9db687464bbd70ecda65c7610e192
font_02_sfnt_off00009af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF9 19016 bytes
SHA-256: f0f368012293b1b974c3c9957311aec52b9f025a39da808060da2dafd97b27bb

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