Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5eaccd418bd3fa…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 11:48:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 15a1c7dfc431ceec5c815e3ba3fdd6d0 SHA-1: b9a172ddf3fcd758345e0447abc7ef55f779b2df SHA-256: 8f5eaccd418bd3faa817dd23e1aa662d8cb47a1600b423174b468b79602821ef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a known malicious redirector URL. The ML classifier also flagged this PDF as malicious. The embedded URL http://netcdn.co/app/431946152/ho9w-to-get-free-robux-game-hack is identified as a malicious redirector, indicating a phishing or scam attempt.

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.co/app/431946152/ho9w-to-get-free-robux-game-hack In PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-hack-robux-into-your-account-2021_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/roblox-codes-to-hacke_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/zyrus-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/roblox-free-robux-club_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-get-anything-you-want-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.jjautomation.in/uploaded_files/userfiles/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000306f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306F 21484 bytes
SHA-256: 7e42504c341f74fd6d2051b3325ad1a5348ad0212a91e530e4d9bc5ce4ddedd7
font_01_sfnt_off00005f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4C 19148 bytes
SHA-256: 98495f57015e4bfcead408d5122b53946cb09c0ef9dd2146995edd1baddf3d26

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