Malicious PDF — malware analysis report

Static analysis result for SHA-256 974a5f5fe0190f1d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 21:15:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9977743a7a8d5bb8c9fc0bad1047a3d0 SHA-1: 7b5a3008878eb485e49f4f51ed923a9128642f45 SHA-256: 974a5f5fe0190f1daae16f8c26d4d8807853b9631ccf45d5d1fe5eaeebf57834
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lure users with promises of game hacks and free in-game currency, specifically mentioning 'Coin Master' and 'Roblox'. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-coins-no-human-verification-game-hack, is flagged as a game hack redirector. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-coins-no-human-verification-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/roblox-dungeon-quest-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-mad-city-hack-client_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-draw-of-roblox-character_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hacking-websites-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/what-are-some-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-key-in-new-hack-roblox-sh-team_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/youtube-ninja-animation-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-give-away-live_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-menu-download-pc_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-to-get-emitted-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/obby-gives-you-free-robux-no-password_GM431946152.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
stream_002_off000031a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A6 22844 bytes
SHA-256: 5249dcfe611976e524b908cda08a484386d2988ac45f97049ed389365143776a
font_01_sfnt_off000064c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 18532 bytes
SHA-256: b4ac0924cc66402825594c2f273c2919cd313c472a67e40b1dcf3e4806c82e27

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