Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f55fc18613f70c2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 10:33:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7e8627d1825551b2c4d9aa4346475c36 SHA-1: a9dc0b918a77afde63a1e5b0c4c7d40d2c186634 SHA-256: 9f55fc18613f70c21d0b721f2b0452198a4c068290eec46569c597741cfcbc70
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with a "game hack" theme, suggesting a phishing or malware distribution attempt. The document body and heuristics indicate the primary goal is to trick the user into clicking a link that leads to potentially harmful content or downloads.

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/roblox-hacking-program-free-download-game-hack In PDF document text
    • https://www.similar.com.tw/upload/files/roblox-promo-codes-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/buy-free-items-roblox_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-app-hack_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/aimbot-hacks-for-roblox-code_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/grow-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-magnet-simolator-hack_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-javascript_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-minecraft-pe-for-free_GM479516143.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_off00002e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E36 22296 bytes
SHA-256: 5ff41135f102d9effe5e27b0ad925b9a0a59e168762ac1dd6137b91c9347e5af
font_01_sfnt_off00005fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 19860 bytes
SHA-256: 20a76c532c108ee60b0f0778baf8d44ee4024cc340d0de9a7b07aeca0b03ee5c