Malicious PDF — malware analysis report

Static analysis result for SHA-256 445e775d42cdfcbd…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 16:36:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 52c453b8bd0f25e12aba3d8b3e3b4949 SHA-1: 956af286144d445065f45ca5f88af629577fc9a0 SHA-256: 445e775d42cdfcbd6193a9a8b759fab8af221ef290cb6adc15b02d49024b7f87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document body and embedded URLs suggest a lure for game-related cheats or exploits. The presence of multiple redirector links indicates a strong intent to lead the user to potentially harmful content.

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/free-headless-glitch-roblox-game-hack In PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-accounts-bugmenot-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/games-that-get-you-free-robux_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-hack-exploit-jailbreak_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-script-game-guardian_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-phantom-forces-aimbot-hack_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/veorra-set-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/hacks-for-legends-of-speed-roblox-download-pc_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-high-school-2-hack_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-earn-free-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-how-to-get-free-robux-from-groups_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/hacks-for-money-for-sunset-city-on-roblox_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
font_00_sfnt_off00002f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F68 22724 bytes
SHA-256: 0d9c2e2d781b917894a6e3901516d79046c33d3a9a931e5e22bd4650c1e72d6d
font_01_sfnt_off0000625e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 19216 bytes
SHA-256: 073dbaf80d8dfa5531e1e3625331a670eef631bd69cdfd26543e35272e2b5cf8

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