Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8de04baca84e70…

MALICIOUS

PDF

46.1 KB Created: 2021-05-12 18:33:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fffac59e3e01bad650ff7acd86289982 SHA-1: d84e9994449148f4438db64231c4fe563d8c310a SHA-256: 2c8de04baca84e70765dca58334d34c99eab772bd7c50782ecc38003067db5e1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The document body and heuristics indicate a clear intent to trick the user into clicking these links, likely to download a second-stage payload or lead them to a phishing site. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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.xyz/app/406889139/free-spins-on-coin-master-generator-game-hack In PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-roebucks-com_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D42 25600 bytes
SHA-256: 49bca6dd772c882ba21885237a11118a6bcca7435614bf64b1e43824337bb7b8
font_01_sfnt_off000088f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F9 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000092e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E4 17884 bytes
SHA-256: cfb0af4fbbd1df0f5f354a34beb8981939ad4119cd9b471d28a21a7783445c90

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