Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7175298b9654ec1…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 22:27:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 34778f3f7e1dc72922f5762aa958c3fa SHA-1: 634fbf0ea2c13e01690afd15979336bfa9099cc0 SHA-256: b7175298b9654ec1199a9863a2b2d740110e401979616beb5de02a2dcb39e3ce
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains embedded URLs and a lure for free Robux, indicating a phishing or scam attempt. The presence of a password archive lure suggests the document is designed to bypass security controls by encrypting a malicious payload. While no scripts were explicitly extracted, the ML classifier and embedded URLs strongly suggest malicious intent, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/free-robux-place-game-hack
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/no-human-verification-coin-master-hack_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/game-give-free-robux_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/tiradas-coin-master_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-online-hack-generator_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-hack-september-2021_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-chest-link_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-app_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/rbx-free-robux_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-bedrock_GM479516143.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/how-to-really-hack-coin-master_GM406889139.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdf
    • https://elearning.alhusna.sch.id/__statics/gudangsoal/files/robux-only_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f9b.bin
32802c3a0b24754fb826eb5852f37be96e4b4db13e7153e3d5e91d683d7f7570		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9B 25740 bytes
font_01_sfnt_off00008aae.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 5696 bytes
font_02_sfnt_off000097c0.bin
a8315d3de564ce67f995c8887965c7d9f34366905f839248eafe88b792a59691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C0 18472 bytes

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