Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf67d200335ba29e…

MALICIOUS

PDF

45.7 KB Created: 2021-06-08 18:48:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 81adac03f75d5ba4d696ea5dd68c73cd SHA-1: d7e7e129c9c9d271600df24250fe078d56eec163 SHA-256: bf67d200335ba29ef08f9b6e112c6d8db07b8738734cd3083c47facdd55e0267
62 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a heuristic firing for PDF_URI, indicating it attempts to direct users to external resources. The document body, though partially corrupted, suggests a lure related to game cheats and hacks, aligning with a phishing or social engineering attack pattern. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-wall-hack-jailbreak-game-hack
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/jailbreak-roblox-hack_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-robux-without-human-verification_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-link-2021_GM406889139.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-com-free-robux_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/bloxland-earn-free-robux_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-100-robux_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/hack-coin-master-no-human-verification_GM406889139.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-tiktok-likes-and-followers_GM835599320.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/minecraft-java-edition-download-free_GM479516143.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-heaven-free-spins_GM406889139.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-pc_GM406889139.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-roblox-on-mobile_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-18_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-roblox-groups-with-funds_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005554.bin
6a272eb1e0f1dd9ca75dfbcc843c48c715a40f92f43849c4d7a9efd2c5b5d98b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5554 24992 bytes
font_01_sfnt_off00008ec9.bin
79812648d6607cb86311d0792518e5e4337073fdc9e38afe32fada506a746e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 18664 bytes

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