Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e53cd84d563ec47…

MALICIOUS

PDF

37.9 KB Created: 2021-05-25 11:36:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7a460cea74857be5ab6f5b586cd2f79d SHA-1: 61792a1fefcd67cca2747150f00abead146621b5 SHA-256: 4e53cd84d563ec47c7c4def5c8a6650eb6892e732ec721f469d98f5cf4e36a9b
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/406889139/free-coin-master-spins-blog-game-hack PDF link annotation
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://elearning.man1acehselatan.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.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
stream_002_off0000366d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x366D 25168 bytes
SHA-256: 799463a98c5fdc374f8222a8d03d2415fe1cdc621235575f23cb356dc4a437ae
font_01_sfnt_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 19432 bytes
SHA-256: 1adabcfff26617b6eab314669df2bebe74e401cd90d119cd8dfeb183455bc5e9

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