Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c57da5a150bb5d1…

MALICIOUS

PDF

49.4 KB Created: 2021-06-11 04:28:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3a32328c681e11a2e93e46b61619d4c9 SHA-1: 7478c7364b231658b589559a7c75d50bf4d69436 SHA-256: 8c57da5a150bb5d16e6630aac860c6604e4e40745c251535be812d7e2c0881e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users interested in game hacks like Roblox. The document body, though heavily obfuscated, contains references to game hacks and download lures. The primary URL points to a known malicious redirector, which likely serves as a gateway to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/roblox-hack-free-download-no-survey-game-hack In PDF document text
    • http://anna-art.in.ua/images/roblox-jailbreak-speed-hack-download_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-tiktok-fans-app_GM835599320.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-get-free-stuff-on-roblox-on-a-phone_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-wings_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/how-to-hack-roblox-accounts-2021-mobile_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-roblox-font_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://anna-art.in.ua/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://anna-art.in.ua/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005253.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5253 26416 bytes
SHA-256: fa22a6fd64b905630fa53a01068b7336cdd3afdb6c23d8332324114ac28d904e
font_01_sfnt_off00008fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE5 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00009b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B87 19284 bytes
SHA-256: d9a8d6dec8583c32534e6e42f2e880378438f93de724feb2f2cc28b47343b5e3