Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f7153d30c45e7e…

MALICIOUS

PDF

49.2 KB Created: 2021-05-20 00:30:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1868fca0cc4485e38963de19c8ebf3c5 SHA-1: 5fa28187cbdc04563d60f76907127c816a8d43b9 SHA-256: c7f7153d30c45e7e4ac03e7c57788769b56bf7fc4ac74d248b2157963b4aeede
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that lead to websites promising free Robux and game hacks, indicating a likely phishing or scam campaign. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of such links were generated. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.xyz/app/431946152/robux-match-game-hack
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-get-free-robux-com_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-robux-videos_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-hack-apk-android_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-hack-2021-app-download_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-roblox-accounts-that-work_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/clean-master-free-coins-and-spins_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/coin-master-free-spin-sites_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/robux-free-gift-card_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/free-coin-master-gifts_GM406889139.pdf
    • https://elearning.mtsn1kabbekasi.com/__statics/gudangsoal/files/roblox-avatar-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b9b.bin
6dd497afcb72a7af12459f5ac1522bd338f631b0837369d18d6db0a48f0e47a5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9B 37116 bytes
font_01_sfnt_off00009df0.bin
4865ec158f9470bac4731bc6ea4e87b30e3d93ae422e073d270352522cf355fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF0 18544 bytes

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