Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3553406bb38900…

MALICIOUS

PDF

49.8 KB Created: 2021-06-11 10:48:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d56149e55bc27f5d1c009c51d2a6c172 SHA-1: c85216e434f718b932eacc1a3c7f24d936f12c54 SHA-256: 2b3553406bb389007f7c786927aec8bde37b04f596a7966183bed1630c68f352
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and generators. The presence of a critical heuristic for malicious redirectors and the ML classifier's high confidence score indicate a high likelihood of this document being used for malicious purposes. Although no scripts were extracted, the embedded URLs and document body content strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/speed-hack-roblox-wild-revolvers-game-hack In PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-make-a-free-robux-game-v3rmillion_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/fly-hack-roblox-lumber-tycoon-2-francais_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-free-robux-website_GM431946152.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_004_off00005477.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5477 26320 bytes
SHA-256: 3ed66816616d29f4a292ab279293a09926f8c3e8d46486328ba91f091df011b0
font_01_sfnt_off00009136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9136 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DDD 18964 bytes
SHA-256: 60d46b50d6ec1a273d9cb2a2a52a5595d8c5719797b10f0cdbd9c52d8ece2d98

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