Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b808177737e509…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 12:39:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a5155dfef337827e08da73e2822b33f SHA-1: 95ff459cf025dfda09b42efe9eef6ba12e416af3 SHA-256: 72b808177737e509469a36b3b9ba3bf5a63ccc8cee521131d7459d3813d3b890
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks'. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF format itself can host malicious JavaScript, and the overall context points to a phishing or malware distribution attempt.

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/431946152/free-robux-not-fake-game-hack In PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-player-free_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/descargar-hacks-para-roblox-pc_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-hack-2021-real-no-human-verification_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/run-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-password-hack-website_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/error-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-app-download_GM431946152.pdfIn PDF document text
    • https://rsudwangaya.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-admin-on-roblox-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_off000033f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F2 22532 bytes
SHA-256: 69c7a5831b827acde1791c05bfe739a5ad7cf3b3384295ce08aa81279815a947
font_01_sfnt_off0000664a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664A 18992 bytes
SHA-256: e4ac39d57ff956450bb8dd48df15acc1078399c4d14e18067568ebfa6ae85f6b

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