Malicious PDF — malware analysis report

Static analysis result for SHA-256 8902ca56a8fec51b…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 13:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d04956bd0779e24726d4f7a938ffd979 SHA-1: afe124ada36fe686279a40d6135080f1daeb77ba SHA-256: 8902ca56a8fec51b9928ecdca07dd55c41217c837e5f21d429fd3cdb28091791
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, that promise game hacks and free currency. The document body and embedded links suggest a lure for users interested in free-to-play game exploits. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection and potential download attempts.

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/479516143/is-windows-10-minecraft-free-game-hack In PDF document text
    • http://xenonsvjetla.com/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/robux-online_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/haktuts-coin-master-free-spins_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_off000048d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D4 24028 bytes
SHA-256: 1bc16b1053ca17a1307d398801e2fb7efb0f438ab137975abe6ed60aba8d8385
font_01_sfnt_off00007f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8B 18524 bytes
SHA-256: 171145d693b5cd868e8a770b6e84adad06c35cb86194a4ae2474cf18c95c1c24

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