Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a628faf529c9bd…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 07:40:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d84a8311c9a10a1d972d2e8717c0c3c SHA-1: cc8ac9d54f540926d9e3afe5eedb88d08d947992 SHA-256: 27a628faf529c9bddc3f91d664e94c257188c66efba84c601869d7ea042fe9dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures for game hacks and in-game currency. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-programers-game-hack, is identified as a malicious redirector. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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-hack-programers-game-hack In PDF document text
    • http://croatia-flyfishing.com/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/dodgeball-roblox-hack_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/tiktok-free-likes-and-followers-2021_GM835599320.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-hack-chrome_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-mod-menu-free-download_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-no-human-verification-or-survey-2021_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_off000030a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A3 23364 bytes
SHA-256: b425d24633b1b881114b334e4a3be34fdc197981920718855e39d03f37723c4e
font_01_sfnt_off0000653a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653A 18416 bytes
SHA-256: 5741a127261724fddf521fc94ebfc06f31583a26a9f94a4c147a021759ab8b48

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