Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b99cc6febdb5aae…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 15:09:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 45a4c148337c980a964de0ba5b6fb593 SHA-1: eb55767ef63234964f294f4c6de3b33d7329a5d5 SHA-256: 2b99cc6febdb5aaec3bfa5bb8faf94f2edf9432311df31b8fce629575f87089a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure for game hacks and free resources, directing users to malicious URLs. These URLs, in turn, host further malicious PDFs, indicating a multi-stage attack. The ML classifier strongly flagged this sample as malicious, and the presence of redirector links confirms a malicious workflow designed to lead users to potentially harmful content.

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/406889139/coin-master-free-coins-and-spins-online-tool-game-hack In PDF document text
    • http://ladagoterie.fr/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/robux-win_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://ladagoterie.fr/images/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://ladagoterie.fr/images/coin-master-hack-online-link_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_003_off000048f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F9 25660 bytes
SHA-256: 1389f06219b6e76f32467efcaf8e464145e42ef10b18926d4ae0f5f489420061
font_01_sfnt_off000083ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BA 18132 bytes
SHA-256: 5770a65a4ed8a40abc6da47fa935f6885b77eddd7dd52b1dc7a39247a3b65962

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