Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e778d484fb6a355…

MALICIOUS

PDF

47.0 KB Created: 2021-06-11 13:22:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c1807745e571194830188a1264a975b9 SHA-1: 9053473644c365e074812f867986d4a558843a81 SHA-256: 4e778d484fb6a355af88608244ac47e85afe98a1a6784713a299019bbbd9043f
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 0.9769

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.tw/app/406889139/coin-master-free-spins-link-2021-today-game-hack PDF link annotation
    • http://www.sabbiadoro.net/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/roblox-jailbreak-play-for-free_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://www.sabbiadoro.net/images/hackear-coin-master_GM406889139.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_004_off0000501a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501A 23972 bytes
SHA-256: 34be4048f72f1dcb839c10d39170b1efcad3d3c029afbfcb615bc7312722df79
font_01_sfnt_off000086a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A8 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off0000932e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932E 18812 bytes
SHA-256: 705c5903f824403b328e8e9dbd2ab52a650d097fc3c0d4bbd34be772086d041a

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