Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b9baf315a50b1e1…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 17:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7d18e6d95570078a7eb26aff1582be49 SHA-1: afdd0f2f83b3abf1c3bd153cf815290562027251 SHA-256: 2b9baf315a50b1e17453815b96c3942ad84ac1aac7627377d706a89c6e945625
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary URL, http://netcdn.tw/app/431946152/roblox-got-talent-piano-hack-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a scam aimed at tricking users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-got-talent-piano-hack-game-hack In PDF document text
    • http://achauco.vn/public/upload/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/break-free-dangerous-woman-tour-studio-version-roblox-music-code_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/jailbreak-cheats-roblox-2021_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/cash-for-apps-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-website-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-gold-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/robux-for-free-website_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/free-roblox-hack-no-human-verify-for-tablets_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/roblox-vehicle-simulator-free-gamepass_GM431946152.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://achauco.vn/public/upload/files/minecraft-ore-finder-mod_GM479516143.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
font_00_sfnt_off00002f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F93 22452 bytes
SHA-256: 18ebd435afffc2efcea9eb3307fa85f5ac85e09df4e02dfda5417cfe640bc625
font_01_sfnt_off0000618f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 19032 bytes
SHA-256: ceb6b6676ad0bc53fab19b8d7e907d465d751d2ce602378615980930f57ff6e8