Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64d9d7b592fc467…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 10:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 00582ebe67f0c1a38150e265e4e4969d SHA-1: 737fdaf14f6e27a7f52fa4ab66f00b5262b032dc SHA-256: c64d9d7b592fc4675c2f91bd144905b84e8834a9680878ed428744cab23d4f00
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising free game hacks and currency. The primary link, http://netcdn.co/app/431946152/robux-free-codes-legit-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering lure to drive users to potentially malicious content or further downloads.

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.co/app/431946152/robux-free-codes-legit-game-hack In PDF document text
    • https://alisa.com.tw/upload/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-free-robux-on-2021-ouick_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://alisa.com.tw/upload/files/free-minecraft-printables_GM479516143.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_off00003162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3162 22124 bytes
SHA-256: 774b53b9de60e62fb3994fed4a3597e1e50c2f90c18e965cab97e4b88a412763
font_01_sfnt_off000062d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 18928 bytes
SHA-256: fd84fff91fde894662ce7d525c61c66e104f07e3dfbe1f872f911ec6ba0a7c6a

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