Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e6f657a31965ae…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 20:06:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 941bb7af698adf325e94c4b69258cdbc SHA-1: e7c9b328a7e95351a800f27f7584a487abf61b29 SHA-256: 21e6f657a31965ae319af167caa0deb7120ed5f47c022848a9e69ce0cbb025da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'unlimited Robux'. The document body and heuristics indicate a lure designed to trick users into visiting these malicious sites. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.online/app/431946152/how-to-get-unlimited-robux-2021-game-hack In PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/getrobux-info_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-ios-2021_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_004_off00005671.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5671 26260 bytes
SHA-256: e784faf3d16f8dce1377e812850ae1ca9e53986b2a4d84f7868ea6cba095b4f9
font_01_sfnt_off00009210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 19336 bytes
SHA-256: 1d788979998456612fc8aa94ab3a8f98716d71a7de86621e0b208fb5420da083

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