Malicious PDF — malware analysis report

Static analysis result for SHA-256 9570aba2964f12d7…

MALICIOUS

PDF

56.1 KB Created: 2021-05-12 04:36:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 95f0961abec192bc73c89ed51715a7f2 SHA-1: aa18d670078f1ab5ebd15dab19155beb779d6d61 SHA-256: 9570aba2964f12d752c7ab88ef0fdc683c780d08b24e2fd0ef1398fb62a5fca1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are disguised as game hacks or generators for popular mobile games like Coin Master and Roblox. The primary URL, 'https://netcdn.xyz/app/406889139/coin-master-hack-mod-game-download-game-hack', is identified as a redirector lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive users to potentially malicious sites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8162

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-hack-mod-game-download-game-hack PDF link annotation
    • http://fourieredu.cz/files/ckfinder/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/worst-client_GM479516143.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/free-robux-script_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://fourieredu.cz/files/ckfinder/files/robux-com-free_GM431946152.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_003_off00004c5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C5A 26632 bytes
SHA-256: f30424e787dac40a3cd5448397e67dca0c188b8c2e9b439e776633bfd38b06bd
font_01_sfnt_off00008b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B51 3192 bytes
SHA-256: 2fd5d459aed3710c9c4c82cf2996fa8c4aa469387e05cce3a70daf2fdb781166
font_02_sfnt_off00009684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9684 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9A9 18556 bytes
SHA-256: 6ae4edda5b33261e183c1fbe66246d10fbe6e53c76ae39713cb0d7eff25940de
font_04_sfnt_off0000cc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC92 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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