Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f721b6e796f995…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 06:35:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf142a075d61293f70a59e40eb3e932b SHA-1: 272f7ba6a04a37f6d1fba3448b37f08f4c4963f0 SHA-256: c9f721b6e796f9955831307b52902b97e0712614e1ec27384960aa9d5d7dd853
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as a "free generator / game hack". The ML classifier strongly indicated maliciousness, and the document body contains multiple URLs pointing to similar lure content. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-no-human-verification-or-survey-or-download-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/free-robux-no-human-verification-or-survey-or-download-game-hack In PDF document text
    • http://slims.abulyatama.ac.id//repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-btools-hack-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000517c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517C 26208 bytes
SHA-256: 17c2e914cdbba6f4d827ff0d3aa37b1685f8a79d5ab28e52cadce9cccb92bb58
font_01_sfnt_off00008dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCF 19736 bytes
SHA-256: 59e4374f8172b973ba9217c83b5ce6b26483f5ae1ceeffd331798f57e1658bad

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