Malicious PDF — malware analysis report

Static analysis result for SHA-256 051364ffe6e15385…

MALICIOUS

PDF

45.8 KB Created: 2021-06-11 11:28:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 393e72483dcc4d62ede121b3e6ceeb92 SHA-1: 959aef4fd5ff1ceb2844fefdc5529b6550f3d3ab SHA-256: 051364ffe6e1538503376bbfbc8e88aa717731fcba787517bb32f4aa33e27366
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, masquerading as generators or hacks for popular games like Roblox and Minecraft. These links, such as 'https://netcdn.tw/app/431946152/codes-for-free-knifes-assasin-roblox-game-hack', are designed to lure unsuspecting users into clicking them. The presence of a 'ML_NYX_PDF_MALICIOUS' heuristic firing and the nature of the lures strongly suggest a malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/codes-for-free-knifes-assasin-roblox-game-hack PDF link annotation
    • http://ines.co.rs/images/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • http://ines.co.rs/images/pokemon-go-free-qwilfish_GM1094591345.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-jailbreak-hack-exploit-free-fly-hack-and-teleport_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-daily-free-spins-and-coins-link_GM406889139.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_004_off000052da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52DA 26124 bytes
SHA-256: 26b981a6a579d6252f38ee3fcbc939927b6d6e2795423be2f86f9ddc8df6035f
font_01_sfnt_off00009015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9015 18472 bytes
SHA-256: a475674f0115c50eb3f794e782c189f3c4b3eab42321479d9e17c4cb17e96dc8

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