Malicious PDF — malware analysis report

Static analysis result for SHA-256 a816e097c94f9c58…

MALICIOUS

PDF

29.0 KB Created: 2021-05-10 18:35:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f65de2d2041bbd7dcda796ac9c4184ee SHA-1: d8d1af67ea1886626522792462247c1e22eae773 SHA-256: a816e097c94f9c589a01cc907e7c963bbc65ac8f65f3d4fa753120a1b9e7fb47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to obtaining free Robux and game hacks, directing users to malicious redirector infrastructure. The primary lure URL is https://netcdn.xyz/app/431946152/how-do-u-get-free-robux-2021-game-hack, which is flagged as malicious. The document's content and embedded links strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

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-u-get-free-robux-2021-game-hack In PDF document text
    • http://oca.undil.tl/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-2021-hack_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_off000020e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E9 20268 bytes
SHA-256: 42b76ba09e94db9fa38a14b6d6470fab03848dacf4e23d2b2873cb829651a1d5
font_01_sfnt_off00004bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF7 19040 bytes
SHA-256: 14ed63897d8c38c9b74f4ae6c685ddc963b8153977262fdb6411d06658c720a7

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