Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7c3a711a911475…

MALICIOUS

PDF

33.7 KB Created: 2021-07-08 21:04:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ee8ffab29b8f08d9ce3fea1c31df003f SHA-1: 847f5832a3b85fb00045449a500d53c6e5b6120d SHA-256: cb7c3a711a911475dab5b1f34d0d979c2fbce11a259b7b322f27f2eb3da3a3e0
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/431946152/op-rewards-robux-game-hack PDF link annotation
    • http://autoskola-scp.com/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/hacker-news-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hack-2021-descargar-mediafire_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/make-robux-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-easy-2021-december_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-youtube-kazok_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-intro-template_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/pubg-uc-deducted_GM1330123889.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_off00002d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D14 22344 bytes
SHA-256: 7cf962da8fb36c2ba7bd75e64e5e5a4603bb8f7ae6ff0ed5fb6d78ed45318bf1
font_01_sfnt_off00005e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E65 19068 bytes
SHA-256: 534faaa36bf089c7ecbe950730c1199a35b13db4b273adfd3dba00952940d618

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