Malicious PDF — malware analysis report

Static analysis result for SHA-256 face58fbff48062a…

MALICIOUS

PDF

48.9 KB Created: 2021-06-03 08:48:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5d063784b61fda6ba4bbb6267c13d92b SHA-1: 18356904cf6dd28284ccda1cad9dbdf146577ef4 SHA-256: face58fbff48062a48376e25a752bfcff62628ab4bf2d130dcacd08f9c8a591e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a lure related to obtaining free Robux, suggesting a phishing or scam attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing the user to decrypt a password-protected archive, likely containing a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/games-to-get-free-robux-game-hack PDF link annotation
    • https://library.stikeswnpalu.ac.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/tiktok-free-blue-tick_GM835599320.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.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_004_off00004ea1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA1 27976 bytes
SHA-256: b42f256688fd3b58ddbd564d6aaae12ce1f63d36463299b22cefc66b9946cab3
font_01_sfnt_off00008e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5A 4088 bytes
SHA-256: 5c45131fc40d1255757522f72f59c063136e87eeb14b9e6867d9c8d78423b488
font_02_sfnt_off00009ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA9 18608 bytes
SHA-256: 08e91301afb793f0c8f569168ad93911c90315771ef2b58170e32493949df7cc

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