Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21e588ad3db55b3…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 01:46:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41344fdca36399d39010fbb31742b1d6 SHA-1: 776ac946f9e7ae84c48b214cac89a2a559691193 SHA-256: c21e588ad3db55b3e7ee073f548bbedb76ba8b0b665b82bf67b16ad2810609ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to a 'game hack' generator, which is a common lure for malicious content. The document body and heuristics indicate that the primary purpose is to redirect users to potentially harmful websites. No scripts were extracted, but the embedded URLs and the nature of the lure suggest a phishing or social engineering attack.

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/how-to-hack-coin-master-game-game-hack In PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-hacking-accounts-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/pubg-uc-price_GM1330123889.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-codes-cheats_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-for-free-no-money-unblocked_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-one-piece-millenium-hack-no-script_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-hack-stuff-in-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-download-roblox-mm2-hacks_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spins_GM406889139.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/facebook-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-exploit-injector-free_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/eating-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-hack-someones-account-on-roblox_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
font_00_sfnt_off00002ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED3 22768 bytes
SHA-256: 9bd204bea469ebf97879a10e453defaa02b919fcc1b3164c4ab61ebe06bb6b7c
font_01_sfnt_off000061c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 18428 bytes
SHA-256: 1b515550e836c22b85926dfb42e46c30c9e7b75c78fcc864c57374ff32ab1983

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