Malicious PDF — malware analysis report

Static analysis result for SHA-256 1333b23c2b32c19e…

MALICIOUS

PDF

42.8 KB Created: 2021-05-17 09:47:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 68c19150f17e97c32a9aedc94e14f8da SHA-1: 24bd6df3a6cf7a8a4c349b06685e8ca82261e893 SHA-256: 1333b23c2b32c19efa929abdaa4f2435359a6a5a910b87aa9bf1f719c48c8d73
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, which is a common social engineering tactic. The document body and embedded URLs reinforce this by referencing game-related hacks and free spins, directing users to potentially malicious sites. While no scripts were extracted, the PDF structure itself facilitates the redirection, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/daily-coin-master-free-spin-link-game-hack PDF link annotation
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/robux-earning-websites_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-coins_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_003_off00004c6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C6A 24868 bytes
SHA-256: fd161725425cc72919d54eace1b039dfaef0fd26633b9ca2dc0d19c1b7aa2c95
font_01_sfnt_off00008494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8494 18476 bytes
SHA-256: 0e8ff706f766ebeac8fd51df3b46864e48e50accc558ba14dc70aa8347bf43ac

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