Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7649fee27609b4…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 08:10:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31becceea11176726f904bd2c7c8cf77 SHA-1: 096f7279988410e30e8d72f5ef200a3931876be8 SHA-256: 9c7649fee27609b4872fcc33e5bc706a7d838139e8b8e704c6be93fef239de08
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/roblox-studio-free-robux-game-hack. The document body and heuristics indicate a lure for free game hacks or generators, suggesting a phishing or scam attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-studio-free-robux-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/real-robux-generator_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/rbxdemon_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-hack-roblox-no-verification_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/where-can-i-get-free-coins-for-coin-master_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
font_00_sfnt_off00002fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDA 22176 bytes
SHA-256: 69f507c8009ec823df7c92c3a018ac8fc14175b85032c1e09ffdbca9c89c6079
font_01_sfnt_off0000617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 19188 bytes
SHA-256: a8f681c18c5380531c3743548279ef24b074491e5ef3cbdd9afbc7b3c7c74193

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