Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bb4aa07863b97f…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 02:00:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9007050fa0156b4d8b189628f49d5c21 SHA-1: 6b599f77e4fb2b17638df72f309cb20f03c7f346 SHA-256: 03bb4aa07863b97f0cb19a4cc9db6e9c410efd07c8d8ecfce61321b41880a34d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links, including one that redirects to known malicious infrastructure. The lures used, such as "free generator / game hack" and "free robux", are common social engineering tactics to entice users to click malicious links. The ML classifier also strongly indicated maliciousness.

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/835599320/tiktok-free-like-and-followers-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-2021-july-easy_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-cheats-no-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/t-shirt-roblox-girl-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-advertise-your-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-roblox-like-a-boss_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/get-free-coin-master-coins_GM406889139.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_off00002d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D60 22100 bytes
SHA-256: 0a990ba594d1aa265fd7b02636afbcbc6667fb91077c7504ff919c8b3aef87cc
font_01_sfnt_off00005e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 18384 bytes
SHA-256: 3afeeac39ed0db8b91fc029415cd8561c3b7329216b39dce1b8bf3ac61251e2f

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