Malicious PDF — malware analysis report

Static analysis result for SHA-256 af67ce6f7ffec41b…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 07:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 21937a1337701d008cca40811791c289 SHA-1: 02c12ef89b2dafebc1ed1e2ef2f1c53aac58e8be SHA-256: af67ce6f7ffec41b1275047c2ec685a4effb8a5dde0ab6a4f42522f4d2b25358
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious infrastructure. The document body and heuristics indicate a lure for free game hacks or generators, likely intended to trick users into downloading further malware or visiting phishing sites. 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.co/app/431946152/free-robux-jail-break-game-hack In PDF document text
    • https://weddingcards-expert.tw/upload/files/pubg-uc-in-rupees_GM1330123889.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-free-robux-without-tix_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-download-roblox-hack-proxo-reborn-v132_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/coin-master-levels_GM406889139.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/hack-into-a-roblox-studio-game_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/roblox-phantom-forces-mod-free-weapons_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://weddingcards-expert.tw/upload/files/how-to-hack-someones-password-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_off00002faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAA 22092 bytes
SHA-256: 4d9b68a8def5b2d2adcd95fde9c16f69fdc5282fcf7b34829160847fffab8045
font_01_sfnt_off000060a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 19248 bytes
SHA-256: e9162d5720054c46661c30e70d70b6b8692804a9232d60808d83a032cac941c2

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