Malicious PDF — malware analysis report

Static analysis result for SHA-256 157770b15220f301…

MALICIOUS

PDF

57.9 KB Created: 2021-06-03 14:19:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c4d0ecedf8c293c9de8b98252749bc5c SHA-1: 2f554811364f4aa55f8a03223422e2307949f3f0 SHA-256: 157770b15220f301cd0ac4a79844b6907c84528438a287c61ffa3586a5c8fc11
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack lure, which is a common social engineering tactic. The embedded URL points to a site promising a 'no human verification hack', further supporting this. While no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a potentially malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/2021-no-human-verification-hack-for-coin-master-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pubg-uc-hack-apk_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000541a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x541A 27100 bytes
SHA-256: a90fce2174fc18e8ea87982f7339282cf7c07c6300529985b376e681659a9ea0
font_01_sfnt_off00009140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9140 3208 bytes
SHA-256: cd3f9b707efe5b8092b70c3ed21017c7fc2f08633e1bceb7ffa2a7857b036f72
font_02_sfnt_off00009c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C74 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000af9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9A 18816 bytes
SHA-256: a5b7142760a7e34de8b9a60e3559d331953dfe293005987c3773ce22c08c12b7
font_04_sfnt_off0000d31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31F 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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