Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b640bd51ff5f057…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 12:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: e38eebe482e207b4885edc24ee2f9705 SHA-1: d49d6dd817e545d333cc62620a14233d7eba33ba SHA-256: 2b640bd51ff5f05779e95742cff1a6ca79cc3e80842d847b3249dc505bfc0385
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-android-game-hack In PDF document text
    • http://aspiesretreat.org/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/moon-active-games_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/roblox-top_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://aspiesretreat.org/images/coin-master-free-daily-spins-and-coins_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
stream_003_off000046dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46DC 26180 bytes
SHA-256: b3f141cca326ff2711a2323f75526bdc82e0ba61f8972d2a11da142a241db041
font_01_sfnt_off0000823e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823E 18308 bytes
SHA-256: 3d682ae06d788585f0d48ef4471ddbfed33e391fd6a867cb0ce2fb595824b3ec