Malicious PDF — malware analysis report

Static analysis result for SHA-256 e91351c2df8bb0fe…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 10:04:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 12dc434c58b0415c2be92a409202fb1a SHA-1: 7719bb79567e8bee7e6f3852777f9c10cb84ebe5 SHA-256: e91351c2df8bb0fe5894fc66ca483edba2c7deabb03d58b5557f7e095b342003
62 Risk Score

Malware Insights

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

The PDF document contains a lure for free Robux, a popular in-game currency for Roblox, which is a common tactic for distributing malware. The document body and embedded URLs point to a download link for an application, likely malicious, disguised as a game hack. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/431946152/free-robux-promise-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-robux-on-roblox-with-google-chrome_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-quick-and-easy-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/make-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-no-verification-on-combuter_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-promo-code-generator-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-do-you-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-prices_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-pants-on-roblox-bc_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
font_00_sfnt_off00002eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB4 22040 bytes
SHA-256: d835680d609c6869e3843bbce548b1fac983159c1fcf31978b03eee247259e01
font_01_sfnt_off00005fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC5 19248 bytes
SHA-256: dae4a0d19f8dbc092eee3d3bc7bc24c0579880b935a6d9f58cf246db03c8544d

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