Malicious PDF — malware analysis report

Static analysis result for SHA-256 f644d76949f3cce9…

MALICIOUS

PDF

48.4 KB Created: 2021-06-04 00:33:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 67480e077b4e0e94c49afb5d070b2c13 SHA-1: ec5b927fda03e213ca82c77cafdca1e1b782721f SHA-256: f644d76949f3cce9b768ee6de9e9d7ff8617245047014454c793e479acf02669
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, masquerading as game hacks and free currency generators. The primary lure directs users to 'https://netcdn.online/app/431946152/roblox-robux-codes-2021-game-hack', which is associated with known malicious infrastructure. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-robux-codes-2021-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/mc-update_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_off00004d3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D3A 30984 bytes
SHA-256: a5f7023f34c7573d4eb9d4793e75b64150bc7eb40f20efc250d92465442667b9
font_01_sfnt_off00009001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9001 2820 bytes
SHA-256: 984d79cc00e4aaa21be427f23b56147105e8f12e1ad5c504d904a5b27c613147
font_02_sfnt_off0000999a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x999A 18500 bytes
SHA-256: 1edbcce4bd82082475192fe302fb9de7bbb66fb62099537ca3f6fa8a470d5fc5

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