Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453c0a490980fd3…

MALICIOUS

PDF

50.0 KB Created: 2021-06-11 09:04:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 87528eb25900ae9a16f0098346cee9dc SHA-1: 931ea71481853b941d9d11609fd5705e8f27fad7 SHA-256: 4453c0a490980fd39291c779b38b9ec6723b3114d1ea4bb0acfa294e5b5e9b02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a game hack lure, which redirects to known malicious infrastructure. The document body and embedded URLs reinforce this lure by referencing free game currency and hacks. While no scripts were directly extracted, the PDF's nature and the malicious redirector strongly suggest an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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.tw/app/431946152/how-to-get-free-hair-on-roblox-2021-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hack-free-robux-hack-2021-ios-android-pc_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/a-hack-for-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/download-noclip-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-fast-on-computer_GM431946152.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_off00005006.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5006 29400 bytes
SHA-256: 6a30daed596401f2b5c8fb0456eefd7e9ac989b08966060548dde3f9a8ebbfcc
font_01_sfnt_off00009253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9253 3608 bytes
SHA-256: 608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f
font_02_sfnt_off00009edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDB 18968 bytes
SHA-256: 455f9f757065c9d134854ae3a28681843daa7c296a8d9a099cd1295f43c3d2ed

Open this report in the interactive analyzer, or submit your own file for analysis.