Malicious PDF — malware analysis report

Static analysis result for SHA-256 158955bad33e86db…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 07:03:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f155b6f3f75d33066982c5215d603cb0 SHA-1: c92792cf41a1b14fdc68227c26019fbdd6572eef SHA-256: 158955bad33e86db43f311b6c966f68db3368aa9f1071d4c7d1eee0762bd370c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game items, specifically referencing 'Minecraft App Store Free' and a 'free generator / game hack'. It directs users to the URL https://netcdn.online/app/479516143/minecraft-app-store-free-game-hack, which is flagged as a malicious redirector. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/479516143/minecraft-app-store-free-game-hack In PDF document text
    • http://library.umla.ac.id//repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-freepik_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://www.youtIn 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_off00004f47.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F47 25384 bytes
SHA-256: 2419d9893f8bfe779335ead6a31a6373c56e6e171fb0415f1ff0804ef4abf74f
font_01_sfnt_off00008908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8908 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000092bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92BB 17884 bytes
SHA-256: 623b1663b2c1891d5c9bef86ab5e25bc5f8dd9419736341906055f8cf938b1c4