Malicious PDF — malware analysis report

Static analysis result for SHA-256 928c9b8a7508167b…

MALICIOUS

PDF

47.0 KB Created: 2021-05-14 22:17:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d187b54991aabff83ff1cd8adc2789bd SHA-1: 675891f5162b0e7350755ee0ae9981ad6f0d6224 SHA-256: 928c9b8a7508167b1ac5eaf389bb46c98544e96bc9c914de7e4a52b8960dfc0d
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple embedded URLs and displays a fake CAPTCHA lure to trick users into clicking a link for game hacks. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-link-2021-hack-game-hack, which is presented as a 'free generator / game hack'. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of its direct actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-spins-link-2021-hack-game-hack PDF link annotation
    • http://bolandergroup.com/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://bolandergroup.com/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://bolandergroup.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://bolandergroup.com/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bolandergroup.com/images/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bolandergroup.com/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://bolandergroup.com/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://bolandergroup.com/images/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://bolandergroup.com/images/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://bolandergroup.com/images/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://bolandergroup.com/images/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bolandergroup.com/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B83 26084 bytes
SHA-256: e4589d7cda6d4db246077badecc0f4158da861ab2819ba223cd9af5648aa280f
font_01_sfnt_off00008702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8702 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00009489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9489 18456 bytes
SHA-256: cd0dac1e42acf1dd8fac6ba5781826c7c26695a9ef6d84d4a0ecdd405406f8c6

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