Malicious PDF — malware analysis report

Static analysis result for SHA-256 26dc6a72d20ac258…

MALICIOUS

PDF

46.6 KB Created: 2021-06-11 08:24:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ecad4aaa92108bda5b3296b710f57bfb SHA-1: a29ec19c8cb6d3a0b401b1722f80ed44cc94cbc7 SHA-256: 26dc6a72d20ac258bca855538528b3eda5606e600a39ca0dbcfcd53026d02657
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free generators' and 'game hacks', specifically mentioning Roblox. It embeds multiple URLs that likely lead to malicious content or further phishing attempts. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to trick the user into clicking on these links.

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/how-to-make-a-roblox-badge-for-free-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-demon_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/moon-active-games_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-codes-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_off00004fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEC 28348 bytes
SHA-256: bf0fdf8b95e30dd76d9e6f59060bdf558dea762514b32ce9ea7db7d5dcf8c32c
font_01_sfnt_off000090fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90FD 19168 bytes
SHA-256: 6b92e2cb6cf44bc995a80f053234fa2de800bce157824480755623f94fedc693

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