Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7d9aa7ea7374ff…

MALICIOUS

PDF

42.2 KB Created: 2021-05-17 08:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c61de3f6d2f6dc74615b1cc58efc0219 SHA-1: 679c7edc72ea4c0d76508f14c27834a2413dafee SHA-256: fc7d9aa7ea7374ff78e01428ac11ed10b71de04dfc3e3a4e54ff31fd66cc6459
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body, though partially corrupted, contains similar URLs and text related to game cheats. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-spins-link-2021-game-hack In PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/game-toolbox_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-generator_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/best-minecraft-hacks_GM479516143.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_off000047d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D7 25040 bytes
SHA-256: 1b0fc615053a83c0f9655915667843494601ddc8b29ad8746668ebb8cfe1d41c
font_01_sfnt_off000081dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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