Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f58d7d748e6e38…

MALICIOUS

PDF

31.4 KB Created: 2021-07-06 22:59:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 76a0e572acdc3d1c14d40fdb511b2d3b SHA-1: 123b2b5fd7ac9d2aab9bcb3e3889deedeae09fd1 SHA-256: 39f58d7d748e6e38ef1def571d2d383baa6626aa81c956ce3c1145262c1d22ff
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 0.9774

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/406889139/blogger-free-spins-and-coins-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-name-chace-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/get-back-my-hacked-account-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-robux-without-any-verification_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_off00002a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A62 20816 bytes
SHA-256: deddc2b55bdada8af570a49ba22a630d727d3e94d04773b108d5b20914161a37
font_01_sfnt_off00005772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5772 18536 bytes
SHA-256: 50852dbf7531cc4fa9019f783ee66d9888b7387ba8688abe6aec8dc990aeb4bb

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