Malicious PDF — malware analysis report

Static analysis result for SHA-256 57efb7697545bd7f…

MALICIOUS

PDF

45.3 KB Created: 2021-05-11 02:48:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6336e4537b55e27200be0d2cb9e717bb SHA-1: f21488cec383b8ba3185490e74eef366c0a258c6 SHA-256: 57efb7697545bd7fa7276239ed73cbbb8db2761c817eca267fec15ef5c0501ee
62 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a visual download button, strongly suggesting a lure to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded URLs relate to game hacks, indicating a social engineering tactic to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/earnrobux-game-hack
    • http://e-library.akbid-purworejo.ac.id/repository/roblox40com-robux_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-free-robux-youtube_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-hair-roblox_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/free-spin-appscoin-master_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/roblox-free-clothes-hack_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-hack-online-android_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/how-to-get-robux-easy_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/roblox-rules_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id/repository/martian-lettuce-coin-master-free_GM406889139.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/oprewards-robux_GM431946152.pdf
    • http://e-library.akbid-purworejo.ac.id//repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487d.bin
5bd14e4b5d56e30ee7f5edc516c2e54daac1c6e6624f543739065799620d922b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487D 26316 bytes
font_01_sfnt_off000084f4.bin
fffc44a75043e963a3b5f17a3157feefc139bf8a4cb21e05e66902dfaac8e3ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 2964 bytes
font_02_sfnt_off00008f37.bin
2721194a66b32dfdaea4e26ed0bd84b304de41eeda81871a4ffc347c5a8adb25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F37 18076 bytes

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