Malicious PDF — malware analysis report

Static analysis result for SHA-256 563122d4376bff74…

MALICIOUS

PDF

45.5 KB Created: 2021-05-17 05:48:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1ad5b60f702fb5f52e0ea7982ccf40dc SHA-1: 10b5df2d020b9f30d6f3020e4200d41cddd6d59f SHA-256: 563122d4376bff74e29a7ea62f957242dae92648b6b69e8abd3c033a00cf2e9a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document uses a lure related to free game versions and downloads, indicated by the document body and embedded URLs. The presence of a 'password-protected archive lure' heuristic suggests the document is designed to trick users into downloading a password-protected file, likely containing malware. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/479516143/is-there-a-free-version-of-minecraft-game-hack PDF link annotation
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/rbxdemon_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://chitfund.com/uploaded_files/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.chitfund.com/uploaded_files/userfiles/files/coin-master-hack-generator_GM406889139.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_off00004bc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BC7 26528 bytes
SHA-256: 7f08785ddeba59c992a751112f4708a74ff37a503586280d7905ff23f52b93e7
font_01_sfnt_off00008691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8691 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00009038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9038 18012 bytes
SHA-256: aceee9a041b582042c2100ba6115aff943c09cf12b5359888ef7326718d96eb0

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