Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac546024a8bf9ee5…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 18:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 536760238aba3fa707b01e27f9c0a778 SHA-1: a49142b68b47a5deb0b038e729a8c130f36a6415 SHA-256: ac546024a8bf9ee5e4575ef2d75bf91c426bd55a820ecdcfa41a93e7ad9c98fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising cheats and generators for games like Roblox. The primary lure URL is http://netcdn.co/app/431946152/comment-installer-un-cheat-sur-roblox-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to malicious websites, likely for further exploitation or malware delivery.

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/comment-installer-un-cheat-sur-roblox-game-hack In PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-boy-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/critical-strike-roblox-point-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/pubg-uc-hilesi_GM1330123889.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-networks_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/tiktok-free-840-apk_GM835599320.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/build-a-boat-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification_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_off00003133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3133 22048 bytes
SHA-256: 8d1915e63951882b098b125d86d94fddc9a45ef0f87c1e890831bd738e952185
font_01_sfnt_off00006203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6203 19156 bytes
SHA-256: a562284ecaf5e2cdd20b44f9e9edbfad26f010b1046655f57865f83e2d35a81a

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