Malicious PDF — malware analysis report

Static analysis result for SHA-256 b504a8d9c38ed03d…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 04:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 486bc3cbd4c496c63f84be1901a1892c SHA-1: 5cd84557434c74515e7da3ba835120f2cb66a842 SHA-256: b504a8d9c38ed03d91524bc758083e97ad9e3d8e7a4fe2ad4ad012b385c9c01b
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/coin-master-free-daily-spins-link-game-hack PDF link annotation
    • http://kulturlandschaften.eu/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/play-coin-master_GM406889139.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://kulturlandschaften.eu/images/how-to-earn-robux-by-playing-games_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_off000046a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A3 24532 bytes
SHA-256: a67eee6da436d7f550d496d59bae71450a3fd772bf1fafabbc8635d6820ee70a
font_01_sfnt_off00007f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4C 18476 bytes
SHA-256: 219409e4a96e727ac7d03afbf10b928993c8ec078f24206d8d8724722cb954a1

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