Malicious PDF — malware analysis report

Static analysis result for SHA-256 f584b6d9a37a54a8…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 03:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 749b46606ecd3af796d8f75c9461b6b3 SHA-1: 441668aefe8a23aa8952822fa473ee9a44bd8759 SHA-256: f584b6d9a37a54a83b6a5ce5736b403b835ecd6fba52a699379e0a2a56563984
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The document contains numerous links, including algorithmically generated ones, that promise free in-game items and currency, indicative of a scam or phishing attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' lure reinforces the malicious intent. The document likely serves as a lure to direct users to malicious websites or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/free-robux-safe-game-hack
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-free-spin-reward-links_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-hack-download-2021_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-robux-gift-card-generator_GM431946152.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-spins-hack-iphone_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/real-robux_GM431946152.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/minecraft-realms-free_GM479516143.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/universal-minecraft-converter-free_GM479516143.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/mosttechs-coin-master-free-spins_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-coins-free_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/hack-coin-master-app_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-robux-hack-generator_GM431946152.pdf
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cb2.bin
6d21086da0bc3f65ee271d8843fef7643b40b7bda33df3a9be11506fa90f4fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB2 25352 bytes
font_01_sfnt_off0000870a.bin
393a0339ec2761f14ea9b29efa8c9c5fc9788b4979bd41a030a3ecef46023b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870A 18244 bytes

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