Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aec5953f473bb06…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 04:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b13e9d55cacd45eb1833935c8e942238 SHA-1: 3507b51110466739440c3f6f4afdcdb3171dc10a SHA-256: 4aec5953f473bb06942d33d001d77d9b89cee9e41aad0eb715dbcb2b94ac0d78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering "hacks" and "free currency" for popular games, which is a common lure for phishing and malware distribution. The primary redirector URL, https://netcdn.online/app/406889139/coin-master-hack-pro-gamers-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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 https://netcdn.online/app/406889139/coin-master-hack-pro-gamers-game-hack In PDF document text
    • http://mountain.mn/uploads/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://mountain.mn/uploads/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://mountain.mn/uploads/files/coin-master-mod-apk-free-download_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
stream_004_off00004e3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E3E 24600 bytes
SHA-256: 9112a1cf5c4df35435a3172205293b6c62751c874e3791ed42b2ae7098e0e008
font_01_sfnt_off0000857f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857F 18132 bytes
SHA-256: 7c3ba000fcc9e82367a9cf09e7428e48624a936725f215f3086fe1b405a0b7f2