Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c84ce3515aac17…

MALICIOUS

PDF

49.3 KB Created: 2021-06-04 03:04:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8dcf64cba94cc24e2efac356c2853347 SHA-1: 2ce3d8b5ea84512cac4b427a5b13c80c3d54dab6 SHA-256: 23c84ce3515aac170e22ab96543f5fc8e5d3bb98fe1401676442409bbd75ff1c
122 Risk Score

Malware Insights

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

The PDF document employs a lure related to 'free Robux codes generator' and 'game hacks' to entice users to click on malicious links. The presence of MFA/one-time-code harvesting lures suggests an attempt to steal session tokens or credentials. While no scripts were directly extracted, the PDF structure and embedded links indicate a phishing or malware distribution attempt, likely leading to a second-stage download or credential compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.online/app/431946152/free-robux-codes-generator-no-verification-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id//repository/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000557b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x557B 26108 bytes
SHA-256: 900df6268af47bad150098352381925d95bc77032b7f1839658eb7c596664635
font_01_sfnt_off00009286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9286 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_02_sfnt_off00009c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C97 18776 bytes
SHA-256: a4a7f46a8ec4e4fe0089faa119d4be48f59112184e2c655defb35f5102acccee

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