Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf20d7d96a930d18…

MALICIOUS

PDF

44.6 KB Created: 2021-06-08 21:37:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bfeebaf7767716e84d0723b4ff1ebcd5 SHA-1: a5ad7351cc90de45b4fc90b4658eeb3fa8569c0a SHA-256: bf20d7d96a930d184a99dc5d59a051947268797b51ca53252a0bb8ed19bb66e7
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 visual lure suggesting a download, consistent with a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates an attempt to redirect the user to a malicious download. The document body, though heavily obfuscated, contains references to 'Roblox.com Free Bc' and URLs related to game hacks, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.com-free-bc-game-hack
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-get-coin-master-free-spins-in-email_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-hacks-2021_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-com-www_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/get-free-robux-clothes_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-mod_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-likes-on-tiktok_GM835599320.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://perpustakaan.stikeshamzar.ac.id/repository/hack-mod-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051dd.bin
c909740fbd53d40190302766def2bf96d82817cc9ab8df1c751030a5e76bd14e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DD 25764 bytes
font_01_sfnt_off00008c19.bin
ce932039433f3b0380396f41ebd8dbbd450a65bd7c7834f986fc1e0acd586221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C19 18272 bytes

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