Malicious PDF — malware analysis report

Static analysis result for SHA-256 81114b46648eeb4d…

MALICIOUS

PDF

45.5 KB Created: 2021-05-11 16:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f375a379cdc59e1c3218c97f24252453 SHA-1: 830ed405fddc4d51731b7da20ebac8e1b57b4783 SHA-256: 81114b46648eeb4db9b5a711428386cd8cb8cd48ee0afe49781f6241e48d5a12
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, specifically targeting 'Coin Master' and 'Robux' cheats. The primary URL, https://netcdn.xyz/app/406889139/coin-master-online-hack-game-hack, is directly associated with this lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a social engineering tactic to redirect users to potentially malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/coin-master-online-hack-game-hack PDF link annotation
    • http://ilijakom.com/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/robux-cheat_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://ilijakom.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://ilijakom.com/images/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://ilijakom.com/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ilijakom.com/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn 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_003_off00004bbc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBC 25844 bytes
SHA-256: 2591c73423a349e306b27cd549f5a50efdea61d9f3231ec6b033e31503fc81da
font_01_sfnt_off000086d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D5 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000090bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BF 17788 bytes
SHA-256: dd7a4057587595e78019333ccc667320d6d804c022730983449509c018bf4689

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