Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54aeae091628343…

MALICIOUS

PDF

43.8 KB Created: 2021-05-20 01:03:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c0773bcfbe875f2154033ec0248f7185 SHA-1: e213c14638436f6f652c397fe7ae5429601e79f6 SHA-256: b54aeae091628343c51d23df03032fb2024f1596fd5bde30531b854cf88a64b5
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 0.9969

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/free-robux-easy-game-hack PDF link annotation
    • https://kalendarite.eu/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-daily-free-cards_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_003_off000048ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CE 27600 bytes
SHA-256: 4dd7f728b3242a5ff87583124f0793e0d7e2dbf875d4a21a1749f98442d0bcd2
font_01_sfnt_off00008899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8899 18420 bytes
SHA-256: 93fb4fe90c413bceeeea5373daaca89ae05c83417e443247d622c1bd09cfd34e