Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acc3aa708d95e20…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 22:11:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 171c1ada10783634466b1bb2db02407e SHA-1: afb75d78c6ccac76e74f9a72753f2c44fa09e8f7 SHA-256: 0acc3aa708d95e203de368bad622b58ca74387a3e7fd17b772ac6819aae9e3a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically promoting 'free generator / game hack' lures for popular games. The primary link, http://netcdn.co/app/431946152/como-hackear-roblox-con-game-guardian-game-hack, is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely to download further malware or engage in credential harvesting.

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/como-hackear-roblox-con-game-guardian-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-roblox-app_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/como-hackear-roblox-para-tener-robux-2021-facil_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/titanic-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spins-coin-master-2021_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_off000030f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F3 21812 bytes
SHA-256: 59003dc1e7bc893d10c8a1b86c03dad89a655eaa3c9039e9e14ce6da44dfd534
font_01_sfnt_off000060a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 19352 bytes
SHA-256: f90e35f093cfc9ed9dc46c818c75c12ce1619cb26d785cc983edd253356ba30f

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