Malicious PDF — malware analysis report

Static analysis result for SHA-256 20df8a869046e19d…

MALICIOUS

PDF

43.3 KB Created: 2021-05-13 07:12:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5f05c84c6183d80885bb655d2cd8fd87 SHA-1: 13e98ce2eecb20314742d18675fdea22b5203c70 SHA-256: 20df8a869046e19d24080ce1ecfb14d9f0e2b383b823eede2416d048047081db
62 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Roblox Generator" and includes an external URI pointing to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests an attempt to redirect the user to download a second-stage payload. The document body, though partially corrupted, contains references to generators and hacks, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-generator-no-human-verification-game-hack
    • http://elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/freespinandcoin-blogspot_GM406889139.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/coin-master-cards-free_GM406889139.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/spin-links-for-coin-master_GM406889139.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/free-roblox-hair-codes_GM431946152.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/robux-scam_GM431946152.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/robux-for-offers_GM431946152.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-robux-easy_GM431946152.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdf
    • http://www.elearning.mysadam.info/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://elearning.mysadam.info/__statics/gudangsoal/files/download-coin-master-hack-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bf1.bin
802c51f3eec4009037ffc6ff3b83c5ebc0de51042ab6611a9c73bf92ae76c5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF1 25060 bytes
font_01_sfnt_off0000859e.bin
d79baf027547f44448cd8f3b6712cdcd19f331e765a1a7a1a1aa24219739a308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x859E 18772 bytes

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