Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceeb3159d2525ed6…

MALICIOUS

PDF

41.6 KB Created: 2021-05-18 03:31:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c901288543cabc7ffbed3be5a7549d15 SHA-1: be28b0eebc927add5f573599c29b7c6c16d6b4d6 SHA-256: ceeb3159d2525ed6723fea416c42787de9b7525999eca7539a8b5ad291bcb2db
280 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to game hack generators and redirectors, indicating a lure for users to visit potentially malicious websites. The heuristic firings strongly suggest this is a malicious redirector and a link farm designed to attract traffic. The document also requests recovery secrets, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.xyz/app/406889139/coin-master-attack-madness-hack-game-hack In PDF document text
    • http://stroybelan.ru/images/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://stroybelan.ru/images/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://stroybelan.ru/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://stroybelan.ru/images/roblox-2021_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://stroybelan.ru/images/free-robux-no-verification-at-all_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_003_off00004988.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4988 24420 bytes
SHA-256: 9094cb5df5b2d8cdb3b75b585edff33e7c3847c2725fa42271530b1eec844a66
font_01_sfnt_off0000814c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814C 17888 bytes
SHA-256: f7a53a65286f7c98125d4d45247e8746e7e120bffcc9c77c9c81cd5151e0f106

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