Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2a20e688b8e86b…

MALICIOUS

PDF

43.9 KB Created: 2021-06-13 23:08:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: bbc27f87536f1283d99834c080939c8c SHA-1: 5ac2098503191cd8d6498f0bf7c7374cb732eb99 SHA-256: af2a20e688b8e86b4310d837522029b48e6d7507a68003e6fbd4c20bcf118c5e
260 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 http://netcdn.co/app/431946152/roblox-gift-card-redeem-free-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/rbx-earn_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/daily-spin_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/hack-para-destruir-en-roblox_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-points_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-robux-youtube_GM431946152.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_off00004a58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A58 26528 bytes
SHA-256: 24bd734cc8d6bfc7a065ed4164f7364e1bf2c96fafd3601e035b690e2af95dc8
font_01_sfnt_off0000878a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x878A 18836 bytes
SHA-256: 8afed543cef1108f9cbc3a4a48c5e00760899d5a198a6651aab6f6b097d5ba57

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