Malicious PDF — malware analysis report

Static analysis result for SHA-256 262d55ba5314eb5e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 05:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ef031a943d8ea296828ee03b0626923a SHA-1: 0f327bbd5eb98edff8406d61fb6ee515184d7b39 SHA-256: 262d55ba5314eb5e92b6505a58ef41392bdf08b4fe4c864be4179833a2ea91cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure and potentially malicious websites, masquerading as generators for game currency and hacks. The heuristic firings indicate the PDF is designed to lure users to these sites, which are known to host malicious content. The embedded URLs and the document body content strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/coin-master-hack-xyz-2021-game-hack In PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-login-free-games_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-mega-vip-hack_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-credit-card-payment-hack_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-jilbreak-money-free_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/do-you-get-free-robux-roblox_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-free-roblox-dollars_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/easy-robux-today_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-hack-infinity-rpg-roblox_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/roblox-hack-robux-hack-com_GM431946152.pdfIn PDF document text
    • http://inforplace.com.br/ckfinder/userfiles/files/how-to-earn-free-robux_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
stream_002_off00002d2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D2C 23172 bytes
SHA-256: 5d60033e66ef5f7d22535eb018d66ec218e8e48ff0322d8834e518db42a26e7d
font_01_sfnt_off0000614e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 18896 bytes
SHA-256: 6196b08645be86931896c29a7b8527461e4ee1bb55985642a652b484aa03a2ea

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