Malicious PDF — malware analysis report

Static analysis result for SHA-256 b127f73e9e2115a0…

MALICIOUS

PDF

49.0 KB Created: 2021-05-17 00:27:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0dc00210e6d20121694170d1b6d19ce6 SHA-1: 08eee180fde5a38f473014b9469ee5d491c7240e SHA-256: b127f73e9e2115a0904205283fde8191f015fa25a158c8a604ab4567a9b43bfc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/431946152/real-free-robux-codes-game-hack PDF link annotation
    • http://kita-sunshine.de/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/earn-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-free-stars_GM406889139.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_off00004acf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACF 32164 bytes
SHA-256: fe3d4131935dc7aa621840bb9ea45396fc3a75d0fe38d80aed0f0d967f55352d
font_01_sfnt_off00009198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9198 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00009cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC2 18492 bytes
SHA-256: 6ff68d48ac5036b960fd78490347d8f271b820cb13d1967b9212c8abd8834c8c

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