Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad40bff53ce5fd02…

MALICIOUS

PDF

50.9 KB Created: 2021-06-03 09:04:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d3e458dd1427b75e4d1b61782c077ff SHA-1: ba647dde5fb07056963979285fcde3a7da656d5c SHA-256: ad40bff53ce5fd02f71f1eb53b6f063049c12d7e765b57d28218840080b21774
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and the PDF contains an embedded URI pointing to a suspicious URL. The presence of a 'download' lure suggests the document is designed to trick the user into downloading a secondary payload. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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.online/app/406889139/static-moonactive-net-rewards-2021-game-hack In PDF document text
    • http://www.hlad.hr/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F8 29388 bytes
SHA-256: 4f0cf827c0f56c6a30aac3d53930472ae28204fefef3410821d4c9399326f515
font_01_sfnt_off00008ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000098a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A8 18400 bytes
SHA-256: f58e347b836052213ef30a7590f1dd7765bcf8cd7de7ad9ce96baa8761e8ab4d
font_03_sfnt_off0000bb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB65 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088