Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f02dffe1a75ca55…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 05:42:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9b898703fbf28a88b86c56b77e36ff4d SHA-1: 69e91ca74108bbf5600497a1b3d25dd2d3b9197e SHA-256: 3f02dffe1a75ca551a8d2263e1dde980f21a7398fcbf9451bef6c0a8dad3795e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action related to game cheats and hacks, designed to lure users into clicking a malicious redirector. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-cheats-and-hacks-game-hack, which is flagged as a known malicious redirector. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings suggest a social engineering attack aiming to redirect users 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.tw/app/406889139/coin-master-cheats-and-hacks-game-hack In PDF document text
    • https://fridaytravelnepal.com/userfiles/files/git-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-dumb-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-and-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-make-shirts-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-accounts-fast-2021-easy_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/100-free-coin-master-spins_GM406889139.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_off0000315b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315B 22636 bytes
SHA-256: 1b8540d7bfc67e0ff0581575422441d3370ec00cc0ebd8d75270276d24b5adf1
font_01_sfnt_off000063df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 18344 bytes
SHA-256: df5b74f0ef16f9f321c24baab86d168e4bf65afde7b485ed04fa755412025de8

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