Malicious PDF — malware analysis report

Static analysis result for SHA-256 e063ce7e3b48a18a…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 23:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 62a5d853291802984f44f19ef3cd0775 SHA-1: 7edb46d6df1a7a894903de95f473b3fd326b350f SHA-256: e063ce7e3b48a18aacee07bb066b78137b00c5fef2bef80af43b6845aa6161e7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document, generated by wkhtmltopdf, contains numerous embedded URLs and a document body that lures users with promises of free in-game currency for Coin Master and Roblox. The presence of a 'password-protected archive handoff' heuristic suggests the document is intended to trick users into downloading an encrypted payload, which is then likely decrypted using provided password instructions. The ML classifier strongly flags this PDF as malicious, indicating it likely serves as a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-attacks-on-coin-master-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library//repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/change-username-roblox-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-enter-passcode_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/are-there-secret-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-robux-hack-com_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-free-codes-toys_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-cheat-engine-god_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-rewards-site_GM431946152.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_002_off000031a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A3 23144 bytes
SHA-256: 7f3b143ac6e413094346d272aec28054c8bbc6fa29eee6ea07b245bc96e0c44e
font_01_sfnt_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 18168 bytes
SHA-256: 43abfb39722ac35456cab2146e99d839ad875e13a0429ae15e438ba8c232cde3

Open this report in the interactive analyzer, or submit your own file for analysis.