Malicious PDF — malware analysis report

Static analysis result for SHA-256 f640675b80f7969d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 07:09:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8d17fcb43eaffbf37cbbfc766ae22a50 SHA-1: d5dbaf676e95e56f7d732cea0b74e7fe2ac73e01 SHA-256: f640675b80f7969db149e103c284812eeffa6c81898e4b7b4d924ab42a3ef222
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/how-to-get-free-robux-hack-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/roblox-dungeon-quest-free-account_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-make-shirt-price-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-pillow-simulator-free-pillows_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/arsenal-roblox-hacks-pasebin_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hack-robux-promo-code_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-game-card-generator-download-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/cheats-to-get-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/injector-hack-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-game_GM406889139.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/where-to-find-roblox-speed-hacks_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_off00003222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3222 21656 bytes
SHA-256: e8495b62af1b91940c62824d59734486144cb728cce54b6f151aab3b7bfa5c56
font_01_sfnt_off000061ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 19152 bytes
SHA-256: a9bff55de90b7722e0be476df1c7a65da1171d9638b3b21a902752e59eae7e63

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