Malicious PDF — malware analysis report

Static analysis result for SHA-256 d254bea6a72a3ef9…

MALICIOUS

PDF

43.4 KB Created: 2021-05-17 20:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 73635185346f24ef5cc56effd69144b0 SHA-1: 883212a81edb82a27bd31624d7b0e58bbf112133 SHA-256: d254bea6a72a3ef9735ce2dde825af0f47424f3477e7bd5b52d553a69cc05ecb
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/406889139/claim-free-spins-coin-master-game-hack PDF link annotation
    • http://ff-obertraun.at/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://ff-obertraun.at/images/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://ff-obertraun.at/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://ff-obertraun.at/images/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://ff-obertraun.at/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://ff-obertraun.at/images/coin-master_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_off00004642.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4642 29176 bytes
SHA-256: 3d8e10baf291fb0879c58a74fe7fd2b3e5622c882d7b17fc7656525a33feaf17
font_01_sfnt_off000087eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EB 18220 bytes
SHA-256: a27868aca9095d1db43e3a34661a683bdd93dcaecb4c52cce590f5e85fca806a

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