Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9f41e2c6014461…

MALICIOUS

PDF

35.8 KB Created: 2021-06-20 21:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 400b2b6b5a602e69d73a9d875f01cece SHA-1: a4d85e6585ac71313dd60abac30500214fb34fc3 SHA-256: ed9f41e2c60144615050e212dc4cf16399fa3a3ec7d9313f500be560b0a0fa66
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a generator for game cheats. The document body and heuristics indicate a lure for free game items, specifically referencing 'Robux' and 'game hack'. The primary malicious URL identified is http://netcdn.co/app/431946152/free-roblox-cheat-codes-for-robux-game-hack, which is flagged as a malicious redirector. No scripts were extracted, but the PDF structure and embedded links strongly suggest 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/free-roblox-cheat-codes-for-robux-game-hack In PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/whats-robux_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/youtube-nicsterv-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/hacks-de-roblox-para-conseguir-robux_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/roblox-variable-modifier-script-cheat_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/roblox-oof-combat-hack_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-to-get-free-gamepasses-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/roblox-meep-city-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/i-hacked-into-roblox-omg_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://www.ksmt.edu.np/assets/ckfinder/userfiles/files/how-can-i-hack-money-in-roblox_GM431946152.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_off000033fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33FB 22724 bytes
SHA-256: f5a89029e08b4d4c1f80fa763c7a989a34f3b66fe61969310f8384c6b3e3b88d
font_01_sfnt_off0000668e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x668E 19236 bytes
SHA-256: 1e609d5144f0ca70bb701e06f556f0bdaa280377f35229e12d05c720eda0788a

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