Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1ecd4f33609106…

MALICIOUS

PDF

32.8 KB Created: 2021-07-04 03:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 107f8f98b32b3a6fa8bc8c67f7f09a42 SHA-1: b40f0bf00db998bd4e239f60c5f27e4eacc309d4 SHA-256: 1b1ecd4f33609106748444501c33f28fc7e3b499534e275329bdfaf295c72e01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure, specifically designed to lure users with promises of free game currency or hacks. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves directing users to a malicious redirector, likely to download further payloads or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/youtube-how-to-get-free-robux-game-hack In PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-tokyo-ghoul-online-hack_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/www-robux-us_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/114-hacks_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD2 21792 bytes
SHA-256: 024d11b16e8ef646c599749de311857fd6f7a5f63ad90071968789b230aea5c6
font_01_sfnt_off00005ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE8 19144 bytes
SHA-256: d5dc46d66495a28e13f0948931c4fe5cc77d6e5ab0084fce9cb8e9a7871dae1a

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