Malicious PDF — malware analysis report

Static analysis result for SHA-256 54301c4c504a7d88…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 12:41:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0ec120e8a8e6817a9071d47316d3941d SHA-1: 18f54e8b5e8f77346b6db0c32bf23052afffa671 SHA-256: 54301c4c504a7d88cf53a1904a15eb9231830851a5b6693032d5010843007305
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "game hack" which redirects to a malicious URL. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely intended to lead the user to a site that may host further malicious content or attempt social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/ultimate-free-spins-coin-master-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b62.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B62 26784 bytes
SHA-256: 52367d0283047ebb88cde743cac07592778fc85e056c8107ea6670202889ea4e
font_01_sfnt_off000087db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DB 18408 bytes
SHA-256: 069e81d139e88509d82e8224148cc48daf359350e2997d733607192457d28ec7

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