Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8c758d7b8dee46…

MALICIOUS

PDF

34.4 KB Created: 2021-07-19 19:21:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5b4dfff5122765c6bb6be36d34d96010 SHA-1: 89371d69f6399cd69fb174f4211254f51bde9de1 SHA-256: 6d8c758d7b8dee46eff72fb474da32b9e3fbb9814f0f478e51ea18126840b4e8
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 0.9955

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/406889139/coin-master-free-spins-2021-game-hack PDF link annotation
    • http://j-cook.pro/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://j-cook.pro/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://j-cook.pro/images/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://j-cook.pro/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-free-spin-and-coins-links_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_off00002fc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC7 23444 bytes
SHA-256: 4e99254aeba24197481771d68e696b30452f8dcb59458d5f4727b73b20349316
font_01_sfnt_off00006479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6479 18288 bytes
SHA-256: 9f7609fba99e53c6baa99bb04d1c7e3f9b7167131c1520eb2a413cdab4a14871

Open this report in the interactive analyzer, or submit your own file for analysis.