Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b3ee7b1335eaa9…

MALICIOUS

PDF

45.8 KB Created: 2021-05-17 07:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9bfea9e1c1a26e27eb73d4a6a02f9d7e SHA-1: acd0f16e477e9f6c5a940651f7b9a973213ace83 SHA-256: f2b3ee7b1335eaa9cd9bad23ff5c564165d98058b8e76fe86bc3a52c4a939be5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on a malicious redirector disguised as a 'free Robux generator' or 'game hack'. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or phishing pages, indicating a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/431946152/free-robux-generator-game-hack In PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/robux-xyz_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/robux-codes_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47D9 25736 bytes
SHA-256: 14ddf68cbab7cec4922ede6d6ddfe806f27a2b09d6946be186e578aa106f9397
font_01_sfnt_off0000832a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000903b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903B 18344 bytes
SHA-256: 10e3e3d4c68cd560ea953d22ca565409121c707f4baa42eec19ee19970d6ace4

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