Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d88dd708bfd941…

MALICIOUS

PDF

33.6 KB Created: 2021-07-10 02:41:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 57df6018906a064a5c0b9c1ba6b95b48 SHA-1: 1bb054ec3a1b87e855549b7b6ecd7c22c4452d2f SHA-256: 77d88dd708bfd941c8b64a3c6fa0e75cc78e0b1496ea9c61cf5aaa760b938559
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a lure for game hacks, directing users to a known malicious redirector. The document body and embedded URLs suggest a phishing attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the presence of malicious redirectors and the nature of the lure indicate a high likelihood of a phishing or malware distribution campaign.

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.tw/app/406889139/do-coin-master-hacks-work-game-hack In PDF document text
    • https://alisa.com.tw/upload/files/robux-hack-2021-website_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/robux-free-pc_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-cheat-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-help-to-remove-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-robux-hack-javascript_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-account-in-roblox-login-password_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-admin-commands-hack-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-hack-on-roblox-teacup-hack_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/robux-cheat-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-guns-free-fe_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-roblox-gift-card-codes-2021_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
stream_002_off00002d3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D3D 22692 bytes
SHA-256: d132223f9a4251f679ff4c9111c8d38246ad429c0adb7e62a30111451c3b0725
font_01_sfnt_off00006009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 18368 bytes
SHA-256: 90ad0cf12c2a6916d2c592b01db25014e61bd9465bbe9f6561250b63871a9567

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