Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f6f17c9fa6b275…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 10:55:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 63395acbfacf7b56ca47665dfe8d5c6b SHA-1: 1e0316427e0fb4c15d3c0ef23f10d6a12bce29d0 SHA-256: e6f6f17c9fa6b2751e16e7e52acd62012683a0b40c0ed092fea6a12925eaa391
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that are either known malicious redirectors or host potentially unwanted content, such as 'free Robux generators'. The primary lure appears to be related to obtaining free in-game currency for Roblox, aiming to trick users into visiting these sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/roblox-robux-generator-no-human-verification-game-hack In PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-followers-and-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-java-edition-code-free_GM479516143.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_off00005334.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5334 24572 bytes
SHA-256: 026a57b6c9094b0be760f153cd0b94ed8de6f1d9ae8a691d8364522878da738e
font_01_sfnt_off00008b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9B 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000953b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953B 18772 bytes
SHA-256: d70e1896760ce565ff795a6c5d74f9ef69d680ae9e1e6e3d1ff99995b7d1b431

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