Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5955e75bcbb214…

MALICIOUS

PDF

37.8 KB Created: 2021-05-21 08:38:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 474adbaf1f346d2c777188646eb0777f SHA-1: 85bf107419713d3fd67b9a6d995604fdb6875063 SHA-256: fe5955e75bcbb214d167be37e5ab1f41627dd9e4b987f81f8a37307109c9d1d9
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 0.9447

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/431946152/get-free-robux-no-human-verification-game-hack PDF link annotation
    • http://interpretation-dessins-enfants.net/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://interpretation-dessins-enfants.net/images/prison-life-roblox-hacks_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
stream_002_off00003445.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3445 26488 bytes
SHA-256: ebc0e0fe461aef33b45b5e5e8210cfa94a643fc08f7cd663f33e2e42d99be6e9
font_01_sfnt_off000070b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B0 18860 bytes
SHA-256: 77094cb8e4b41d81131149df95963a95cd1356d500cc75fcdf894a2f9afc6be7

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