Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e726a9ecab035f3…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 19:37:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1fa75246bb3d80ff003bee4e5c4edb78 SHA-1: aaf85db0966eba350e417dc73329c42566e9bd5c SHA-256: 1e726a9ecab035f3ff294131caf544c259f0c0178e393069b0f96a82b0b51955
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body also contains the same malicious URL, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, 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.tw/app/431946152/get-free-robux-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-piano-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-hack-site-roblox-unlimited_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/deep-ocean-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/hack-coins-pizzeria-roleplay-remastered-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-retrieve-hacked-account_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-buy-anything-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/roblox-account-free-trial_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-get-a-tiger-free-shard-seekers-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-real-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/how-to-speed-hack-with-bitslicer-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/tiktok-free-vpn_GM835599320.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/dev-console-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00003213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3213 22568 bytes
SHA-256: 940f28c7d75927628196dfb9843ceab910f88d54d6dfab625f419896881d3b6d
font_01_sfnt_off000064ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 18820 bytes
SHA-256: 04d56578d6fa3a791f42370f0ef4c3dea66af1fdc194d67c4390c65d423efb6d