Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edcce4fe66ecc92…

MALICIOUS

PDF

36.6 KB Created: 2021-05-23 02:45:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1a5230ddd310ce3995b3b15f24314741 SHA-1: 8ebb4c5bfa2cde14035e09b0a4ef07546d7d8ef2 SHA-256: 4edcce4fe66ecc928ef597c48ee5d0f4f090cd0fa2c3d8674f0d7e0fba5d5e40
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/479516143/free-minecraft-accounts-2021-game-hack PDF link annotation
    • http://hostalsalou.eu/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-daily-free-spins-link-today_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_off00003597.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3597 24932 bytes
SHA-256: 5d78d7369053c599f73e8fc8215303e3d17b128de684304a83ea7eea4057dc06
font_01_sfnt_off00006ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 18252 bytes
SHA-256: a7a52ec6c2bb565f332a4905da6a686ee34bc05df98df468ad89fd298f001152

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