Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a09357bc7f6cb7d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 23:24:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 75b295f89b4194df11393561530fecd7 SHA-1: de512c3c20e5bc6cd2af4e9963192b803ddc0d12 SHA-256: 5a09357bc7f6cb7d0cda49a79d4c8f229dfabe228ed9573b98cacec740e5d019
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 with lures for game hacks and free currency. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs associated with known malicious redirectors supports this assessment. No scripts were extracted, but the document's structure and embedded URLs are indicative of a phishing or scam attempt.

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-spins-hack-2021-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-robux-for-free-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-admin-commands-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/medieval-hood-of-mystery-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-sniper-update-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-adopt-me-free-game_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/buy-robux-for-free-games_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-hack-for-change-music_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/pokemon-go-free-accounts-2021_GM1094591345.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-fun-hack_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_off00003113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3113 22620 bytes
SHA-256: b3186457447ca289366cd5c03d867bd78943ea79652ab5b8e3d1f831e79da444
font_01_sfnt_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 18580 bytes
SHA-256: 63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5

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