Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4adf7cd0a28d71…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 13:57:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 52925d2fa70121c2171f9ca70f342e25 SHA-1: 6ce21ed5a96aeea7f5077018ccbf1a975782c158 SHA-256: fe4adf7cd0a28d71b9667ecdeaca460eddba92cd2151264a5df17207a6659501
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 0.9832

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 https://netcdn.tw/app/431946152/hack-for-roblox-no-human-verification-2021-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/hacking-apps-for-roblox_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/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-diamond-finder-hack_GM479516143.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/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/without-human-verification-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-do-you-get-roblox-money_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_off000052d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D5 26564 bytes
SHA-256: 8fd6bce5ba6539f3f7833bebf594cdf6ee31201e7f0571efce90ab2f2058f4b9
font_01_sfnt_off00008eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB9 19504 bytes
SHA-256: 8dc2871de39c189464a64be34efeda18d47f51c26241ef1c613b0c2ac6b34f9a

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