Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ff2f8604b7e872…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 07:02:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 08cc240417a816c253891dca16d4b8b7 SHA-1: 309a7259db91b7c96ffcc3388e7ae3cec3bf275d SHA-256: 12ff2f8604b7e8726fa0ccf1b743cdaad9cc1512fa44313abc5c46c3d4a5e565
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/coin-master-free-spins-2021-game-hack PDF link annotation
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/comment-entrer-un-code-sur-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/www-coinmaster_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/roblox-hack-como-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/pubg-uc-free-link_GM1330123889.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-use-cheat-engine-63-on-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-get-robux-free-quik_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D1 22872 bytes
SHA-256: 4c1cb8c3206fefbe3cb7f508a05667a9f4864d46159068c3bfef8fb42b265c08
font_01_sfnt_off0000672a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 18576 bytes
SHA-256: a126babb65047b6746617d7d7f27a00b485a4a24246b96e57b4b97a03add53e0

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