Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d18d7066be29f4f…

MALICIOUS

PDF

41.4 KB Created: 2021-05-20 00:33:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c3eacb4bfd0ce140fc1faddc11758c88 SHA-1: 8957c98a048c5e7772ca46deee8399b447232024 SHA-256: 7d18d7066be29f4f2e97c3f5838eade191806ae8ffb5c9ef4fdd73801c00ccf6
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to sites offering game hacks and cheats, suggesting a lure for downloading potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports this assessment. While no scripts were explicitly extracted, the overall pattern indicates a phishing or social engineering attempt to trick users into visiting malicious sites.

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/835599320/tiktok-free-98-game-hack PDF link annotation
    • https://brainpads.com/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/robux-free-co_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://brainpads.com/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.brainpads.com/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://www.brainpads.com/images/robux-premium_GM431946152.pdfIn PDF document text
    • https://brainpads.com/images/tiktok-free-online-textbooks_GM835599320.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_off000041d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41D4 27860 bytes
SHA-256: f4f3c1d8132f2e72efbf8155769494f3063430f07643a704b01e44fa1dd0c6f0
font_01_sfnt_off00008081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 17828 bytes
SHA-256: d7679a4036d491c8a148b745989ad0300e91de2c3c96453f6c7d7e7c8241dbf3

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