Malicious PDF — malware analysis report

Static analysis result for SHA-256 686598ea1f68ec59…

MALICIOUS

PDF

41.5 KB Created: 2021-05-15 05:41:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d807cd92037fda73d3a731c589836562 SHA-1: b056b8e791da1508f4e420bc75b5d69ce5557e08 SHA-256: 686598ea1f68ec59a15270885db65d6c77f98b70f4712faaf4e991485f7f7017
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 0.9971

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/free-coins-and-spins-for-coin-master-game-hack PDF link annotation
    • https://kalendarite.eu/images/free-robux-real_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/mcpe_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-redeem_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-please_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-net_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-hack_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_003_off00004a86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A86 23752 bytes
SHA-256: 2765ad9eff881638774a67fb90c82cd551f3b15964aa29bc30b4e13bbda84e78
font_01_sfnt_off00008079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8079 18060 bytes
SHA-256: f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120

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