Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ceb33623fc00476…

MALICIOUS

PDF

46.2 KB Created: 2021-05-10 16:53:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c2bd7100d10e40f9c4b3f033fbb6024a SHA-1: 1ac44ad328c32e040dce8ef8a2488bf7e35caa16 SHA-256: 4ceb33623fc00476012303127aa26ec0723c88d9b89d3496328e06d7d6af32e9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL associated with game hacks. The document body, though partially corrupted, contains text related to 'Coins Master Hack' and the authoring application 'wkhtmltopdf', suggesting it was generated to appear as a hack or cheat. The embedded URLs are likely intended to lead users to malicious sites for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/coins-master-hack-game-hack PDF link annotation
    • https://www.cow-style.com.tw/upload/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/blox-supply-free-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A83 28060 bytes
SHA-256: 89a1c944382e328c01726969b16c84412414e0bc715b572dc7776b304853e9c1
font_01_sfnt_off00008a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A13 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000093c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C4 17716 bytes
SHA-256: d488acdeac9c101f8c7dc9d2f61752a744fbde28c1faa2289984f0ec4d4cc76f

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