Malicious PDF — malware analysis report

Static analysis result for SHA-256 f588b4bd12cd7222…

MALICIOUS

PDF

38.2 KB Created: 2021-05-25 10:07:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cf5a241694e2463b35b6a286bf5900ca SHA-1: bd1d9e0ab86fddab4d7ede7c6a2c7e5f5a7828b1 SHA-256: f588b4bd12cd72221f5089a319c7c33d3c1150efec4e1b6f7cc6fb2b1d94fe02
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 0.9407

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 https://netcdn.xyz/app/479516143/best-free-minecraft-server-hosting-game-hack PDF link annotation
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://cbt.man1metro.sch.id/__statics/gudangsoal/files/rbxoffers-com-free-robux_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_off0000335d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335D 28332 bytes
SHA-256: dec887b90f2984d7be1115b37144fd768a2d2745e1c57afbc0c75d8e44704418
font_01_sfnt_off000073df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DF 18328 bytes
SHA-256: 0b2d28431e5234c57104fb234e5f183f246f5a4819408a3d571d7ab08b18c1e5

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