Malicious PDF — malware analysis report

Static analysis result for SHA-256 154bdcea3fb18bee…

MALICIOUS

PDF

41.8 KB Created: 2021-05-13 10:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a99e3155ba7b95dc7a64e11c33de650f SHA-1: 09a869d971409b2843b6eb7a97e69654e84cfe68 SHA-256: 154bdcea3fb18bee8d1ec1ca76a024f5ee340dffb6806cdef7b27d3e2c606a27
62 Risk Score

Malware Insights

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

The PDF document contains a lure for 'Coin Master Free Coins' and an embedded URI pointing to a suspicious domain. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-coins-link-2021-today-game-hack PDF link annotation
    • https://www.fhccu.com/images/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-coin-app_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-verification_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-scam_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_003_off00004752.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4752 24648 bytes
SHA-256: 668a5bc361bb27bceb54d604a8d9a58797d391bfa567450e46c18c1ee7d15b07
font_01_sfnt_off00007fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD8 18636 bytes
SHA-256: 54ee628be55815102d4fd2b2c16d0cf2d83f73b68c782c007c481b291bfa8535

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