Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ce7cb2a3409110…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 18:30:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e845840f21c4715c21886d1f8a3b62b5 SHA-1: bd3d93fcb283a6f568ee63bf493ba6a16f0a3274 SHA-256: 01ce7cb2a3409110f39cef36da0d72b4e528f2e79f76f1618914915f1b86e603
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free generators' for popular games. The primary redirector URL is http://netcdn.tw/app/406889139/coin-master-free-daily-rewards-game-hack, which is flagged as malicious. The document body and embedded links suggest a phishing or scam attempt to trick users into downloading further malicious content.

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/406889139/coin-master-free-daily-rewards-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/cbro-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-free-toy-code_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/pubg-uc-kuwait_GM1330123889.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-how-to-hack-games_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-candy-roblox-decal_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/master-game_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-jailbreak-free-money-codes_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-welcome-to-bloxburg-money-cheat-july-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/hack-theme-park-tycoon-2-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-online_GM406889139.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_off00003079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3079 22540 bytes
SHA-256: bb2fe83c7b4336939466f5081ba61bbaaa19e50e35641db61bc3d6073042144f
font_01_sfnt_off000062bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 18760 bytes
SHA-256: 3b011588543a7bb03f4503a293426fce4deabd47d84bd20145fbbd4cca3b0331

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