Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee42b0813c94bd9…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 16:18:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c54e1c92e5f3bffec0142189cc7ca1d5 SHA-1: 34545033cd4280554a411e7457e63bc8b5b4aef5 SHA-256: 3ee42b0813c94bd99f892700a2541dc538df9e4615e32183182682d019ae2cff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted from this sample.

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/free-gfx-roblox-game-hack In PDF document text
    • https://tpp.com.tw/image/data/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-free-wood-on-trade-land-roblox_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-roblox-executor-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/hacks-para-roblox-mm2-armas_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/filtered-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-2021-legit-feb-unpatched-instantly-no-wait_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-a-dominus-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-jailbreak-cheats-or-hacks_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-use-cheat-engine-on-roblox-2021-august_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-gift-code-roblox_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-fix-roblox-laging-in-proxo-hacks_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-teapot-turret-hack_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_off00003018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3018 22440 bytes
SHA-256: 4069e2cf2a379087133bb1ecf347a2486fb4bf254314221682cf6f714c0b5b03
font_01_sfnt_off0000620c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620C 18652 bytes
SHA-256: 0d63b7d195b4368a7510cc9063280e633f1dd81e04eecc72eeca598e4957848f

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