Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24366e792f422b8…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 20:39:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 70f8a84404a80e305bd476ebd5ec45eb SHA-1: 49c1a82c3b284b13c3f1d495028f05163f8e0ed5 SHA-256: c24366e792f422b84dad86418cfed4f10d3f4e10dd2f2425ab18153c5f4eac2b
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/legit-coin-master-hack-game-hack PDF link annotation
    • https://rietenwinkel.nl/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-private-server-roblox_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_off0000491a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491A 26084 bytes
SHA-256: 9708bfaa084827eabef06e3db6808ba6145b7bcc16c0ddf9b48031c92ca062bc
font_01_sfnt_off00008425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8425 18004 bytes
SHA-256: fa7ced444b4122895ad45f2edf1c5e7fc3242d5e911e2066b19dfc8b4f7e6d2c

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