Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2773170b6ff043f…

MALICIOUS

PDF

46.0 KB Created: 2021-05-16 04:31:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 733822be086e9992cfe1b17b1038a697 SHA-1: 86c00bc841c6c86094e62643daa9e6102f44ec74 SHA-256: e2773170b6ff043fb1b90f72487ccd8a21803261fc4b3b3956e17b865dd17ded
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary redirector URL is https://netcdn.xyz/app/479516143/how-to-get-java-minecraft-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely intended to lead users to further malicious content or downloads.

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/479516143/how-to-get-java-minecraft-free-game-hack In PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://church01.jworld.i-powers.com.tw/webdata/ckfinder/public/userfiles/files/hacks-roblox_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_off00004e99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E99 24920 bytes
SHA-256: 162aa87adf2c1d1257d81667c465cb170f0b03049cb4e7a507bcdf9e5081df62
font_01_sfnt_off0000873d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873D 3096 bytes
SHA-256: 61a050f652ea6cf7436bb1305cc8621bfda1a6fe44d9c3de1a57e8ac399b341d
font_02_sfnt_off000091dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 18152 bytes
SHA-256: b07ca7cfd9f4df49e8124e55bb29c456f703fc5bdce85e2b26b96107911b04a3