Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e71d9f3145f0a0d…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 07:00:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6ae0f4142bb91b42f443fd72def35443 SHA-1: 13f78973a74a643c147b4c9374ee95b8243a5246 SHA-256: 4e71d9f3145f0a0d66a782bf839d9edaef54f924df4cdc061edbb09138e52b7a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/free-robux-images-game-hack PDF link annotation
    • https://leechan.cn/Public/upload/editorfiles/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/roblox-character-girl-free_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/robux-online_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/cheat-roblox-bad-business_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/como-descargar-el-hack-de-roblox-tools_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/hacks-de-roblox-para-todos-los-juegos_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/roblox-cheat-engine-lua-script-pastebin_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/roblox-war-tycoon-cheats_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/how-to-hack-into-a-account-in-roblox_GM431946152.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • https://leechan.cn/Public/upload/editorfiles/how-to-hack-roblox-players-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_off00002f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F02 21368 bytes
SHA-256: ec35e78eb7acdd52dd8309f086b778703148a7be2626ef82f8320fbd4c1f6ab5
font_01_sfnt_off00005d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D94 18976 bytes
SHA-256: f6715e88b90fcea68fd90ecb14bc0b4d412decc30ec826ef46449e8ff66567a5

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