Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd24f4375b180f6…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 03:59:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: abfa1aba4f33ee7007385e94cd72bfcd SHA-1: 8bdc160961095b73ed0d8b9e3e57e00cb5c868a2 SHA-256: 9cd24f4375b180f67a0fe59fdacef43be9c6fbe42a121a313d0558a0b8cf341e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicates maliciousness, and the document body contains a URL that likely leads to a malicious download. The presence of embedded URLs and the overall structure suggest this PDF is designed to trick users into downloading a secondary payload, possibly related to game hacking or cheats. No scripts were extracted from this sample.

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/games-like-coin-master-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-exotics-roblox-assassin_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-make-a-roblox-group-for-free_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_002_off00002e01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E01 23164 bytes
SHA-256: 04f854ecc1038d437f7e25a5aff777fef368a02f6bc369de22e052811ed018f3
font_01_sfnt_off00006252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 18264 bytes
SHA-256: 7d1498385015156658f2c4797ed1f9ef5355b2a3c7c805ee34a2c4c44564bfa8

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