Malicious PDF — malware analysis report

Static analysis result for SHA-256 275ce48623be3eec…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 01:36:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 17d4e7345007cf86c12906cfefa60f98 SHA-1: f329151e73ff81515a60f084882b2766a7b23773 SHA-256: 275ce48623be3eecf4fcbfa8931a68b0ce105d2fc5fab35fc3055229779d4cf2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack lure, directing users to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Roebucks' and a URL that aligns with the heuristic findings. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious nature of this document, likely intended to lead users to a phishing or scam website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/how-do-you-get-roebucks-game-hack In PDF document text
    • https://www.ma-plast.hr/files/level-coin_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-to-hack-coin-master-game-without-verification_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_off00004810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4810 25648 bytes
SHA-256: 6a830962f2d9fd2084285e7e1e72286a70af0eca82a9cb6c076ed9f02ac078d6
font_01_sfnt_off0000831c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831C 18408 bytes
SHA-256: ff346f93049ac2d3fb32d8a2c4dbad06720bfee6e4c1cdd193d0bff0cdbf25c6

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