Malicious PDF — malware analysis report

Static analysis result for SHA-256 134d4e663f925306…

MALICIOUS

PDF

46.9 KB Created: 2021-06-10 14:43:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 140de21d540e79577cb9adc8ce6df677 SHA-1: 59823284f5b8b78730f4965d7ae4389cc1d89e7c SHA-256: 134d4e663f92530636f50ea12d2c5be1f7b8ace2eebc8c4c203e92dbca40f2bd
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering game-related cheats or free items. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests a link farm designed to direct users to potentially malicious sites or phishing pages. No scripts were extracted, but the document's structure and content indicate a lure for users seeking in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/how-to-get-any-model-for-free-on-robux-game-hack PDF link annotation
    • http://s-punkt-objects.de/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/game-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://s-punkt-objects.de/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://s-punkt-objects.de/images/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://s-punkt-objects.de/images/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://s-punkt-objects.de/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://s-punkt-objects.de/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://s-punkt-objects.de/images/how-to-coin-master-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
stream_004_off00005281.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5281 28904 bytes
SHA-256: 5ca60368cd4a979314732d219167e856d9d14cab866b25c15848b9431ce07d78
font_01_sfnt_off0000932c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x932C 18904 bytes
SHA-256: 55e8b8ee987def0990a88c4c43333734a39de5c8f68ee42024529870f74186af

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