Malicious PDF — malware analysis report

Static analysis result for SHA-256 c375e2bc44438563…

MALICIOUS

PDF

46.3 KB Created: 2021-05-10 20:08:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ee2f848593d63b27470eb1df5c3112cc SHA-1: fcc2e0dd9b1791ab1d125d5b790c739165dde00f SHA-256: c375e2bc4443856319d79c717727b05c7c84acd45ed23a041f2af777eef12e11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting a "free generator / game hack" for Minecraft. While no scripts were directly extracted, the presence of malicious redirector links and the ML classifier's high confidence score indicate a high likelihood of a malicious workflow. The document likely serves as a lure to download further malware or engage in fraudulent activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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/minecraft-free-game-hack In PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/coin-master-today_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://el28.ddns.net/__statics/gudangsoal/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D31 27564 bytes
SHA-256: 391bd6bd9916de73227c723f7eed031bdd1930303d0202447e068cc663a675b9
font_01_sfnt_off00008b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B07 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off000094a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A7 17568 bytes
SHA-256: 2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc

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