Malicious PDF — malware analysis report

Static analysis result for SHA-256 127e5111e5bd0c4f…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 07:24:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b98f51cbc5fc61c9070f47e65104152a SHA-1: 8061e107c69674428278d4c36d17105cecfe411f SHA-256: 127e5111e5bd0c4f53b6ffb7b6b8c3b70a4a13bcf146a1a56bd5c195583e0707
82 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic indicating it links to a game hack generator lure. The embedded URL `http://netcdn.tw/app/406889139/2021-free-spins-coin-master-game-hack` is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential exploit or redirection to a malicious site, likely delivered via spearphishing.

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/406889139/2021-free-spins-coin-master-game-hack PDF link annotation
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/robux-free-gift-card-org-generator_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/muffin-combat-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/skip-human-verification-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/hack-para-roblox-flood-escape-2_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/roblox-mars-mining-simulator-hack_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-robux-no-buying-anything_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/roblox-hacks-flame_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/roblox-scripts-changer-cheat_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/robux-offers_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_off000035b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35B3 22932 bytes
SHA-256: fc585335cf718edbf106e5ccbb5a97d7bc119d80d1f27c402a767a6636d7fce5
font_01_sfnt_off000068d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D7 18576 bytes
SHA-256: e072abe3ddea7348b6ad42f3e58cf0336d8cc97c01862fb082958ccb0059bec3

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