Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85d899ebd311319…

MALICIOUS

PDF

35.4 KB Created: 2021-06-18 20:16:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c798de338b87ae0737ad54b0d3004e6d SHA-1: 8169dd3dba89c65f74e63d4991b2bf7443190f80 SHA-256: e85d899ebd3113196124eab5783ae3d37595fe5ad51d2a6dd2027158ce53d201
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, designed to lure users into clicking by promising game hacks. The document body and embedded URLs suggest a scam related to in-game currency or cheats for popular games like Roblox and Coin Master. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly indicate a phishing or scam 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.co/app/431946152/how-to-cheat-roblox-jailbreak-money-game-hack In PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/roblox-medieval-warfare-reforged-how-to-hack_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/script-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.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_off0000325a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325A 22184 bytes
SHA-256: 845c9b0d5a1751c1f3a9aa3e03732d147c4d40c51a9dbc2968413fdb170d23c9
font_01_sfnt_off0000634a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 19752 bytes
SHA-256: 5902b990bca58bc55f8ea5fb6f5ddaf0b0d287483c5cac6c6e68c67385bce87c

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