Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6eb80a4e61efb0…

MALICIOUS

PDF

49.8 KB Created: 2021-06-11 01:18:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bbf87d6b3f2891bd3b91008c7ed59a2c SHA-1: e928e39149e40dc7d48e02ee6b705ab87f9bc2b6 SHA-256: ac6eb80a4e61efb0b7690574a98dc0b00548168dfe8d0439e70cd44facdb84c7
102 Risk Score

Malware Insights

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

The document uses a lure related to Roblox game hacks to trick users into clicking embedded links. It specifically requests sensitive information such as recovery secrets or private keys, indicating a phishing or credential harvesting attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.tw/app/431946152/roblox-surf-hack-game-hack PDF link annotation
    • http://elibrary.uniyap.ac.id/repository/free-roblox-hacks-net_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-cards-live_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-hack-on-roblox-acounts_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-giveaway-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/elts-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-make-time-freeze-in-roblox-free-admin-hangouts_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-printable-roblox-coloring-pictures_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/lingojam-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-without-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-roblox-hack-net_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/tradlands-roblox-cheats-tricks_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-scripts-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-avatar-clothes-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-get-a-free-pet-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-rs16-5-hacks_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-roblox-promo-codes-not-expired_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-hacks-codes-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-hack-roblox-games-no-downloads-2021_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_004_off0000518f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518F 35940 bytes
SHA-256: 3f1edf52cc56d1ddf423a9c82a3433ca60a608bcb0c608f7184bd01982f20742
font_01_sfnt_off0000a068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA068 18320 bytes
SHA-256: 5e2460506cb16a750d243aaa1b8ecc63595404dc7859beb88b13b809002c2652

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