Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e36869dd0761d99…

MALICIOUS

PDF

38.1 KB Created: 2021-07-09 01:58:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e7969dd5063146910a5ae0aa6fa8520 SHA-1: b62b900d08c24d6afb623d17bea923bfd9778ac7 SHA-256: 6e36869dd0761d9912868bb6ebdecfb5078cdb008265f90f14ba6eb90abab6e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks' to lure victims. The ML classifier strongly flagged this PDF as malicious. The embedded links likely lead to phishing pages or further malware downloads, indicating a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/how-to-get-free-robux-instantly-game-hack In PDF document text
    • https://tecturatw.com/image/data/files/free-mobile-24-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/robloxhackbalance_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/robux-apk_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-promo-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/hack-granny-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-i-get-robux-free_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/roblox-how-to-get-free-robux-2021-no-hack_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/roblox-powering-imagination-free-robux_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-codes-august-2021_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-free-robux-2021-legally_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/hack-coin-master-site-rssingcom_GM406889139.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_off00003dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DC4 22336 bytes
SHA-256: f481e23fd2a3863ffe231c6d278ab36c2daf13b4e233748646a59cb53eadd303
font_01_sfnt_off00006f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6C 19240 bytes
SHA-256: 46dd4588562bbb2dce6134725fa943138dd103635f5b260b652d173228825468

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