Malicious PDF — malware analysis report

Static analysis result for SHA-256 092346ba8244b1b3…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 04:12:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 60e66bfbf097eeac534db366a6bc936e SHA-1: 57328275c3ba51516981cfd0f224bc653040611c SHA-256: 092346ba8244b1b3ba8fe7140513a5c8372c945dd41deb9adfdf91074648167f
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/406889139/get-free-spins-coin-master-2021-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/griffin-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/boku-no-roblox-remastered-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-hack-through-walls_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-use-a-cheat-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-videos_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/hack-roblox-fixed-pc-infinity-heroes-x100_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-on-roblox-without-human-verification_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-site_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
font_00_sfnt_off00002f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7D 23180 bytes
SHA-256: 537aff2a89198692b5743f9f007dda75d0d3de5f0006334570e6311ad3a4eea0
font_01_sfnt_off0000636d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 18576 bytes
SHA-256: 47068641d4cd5afad495b2744cbb78709b2a1d88425159384b1e35df59296f67

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