Malicious PDF — malware analysis report

Static analysis result for SHA-256 574456eb1bddcd4f…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 12:39:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f049acd8160300bd02f686d8ff000478 SHA-1: 8bf8430b107251c251800037b8a3330f68255409 SHA-256: 574456eb1bddcd4fbfd11f76fccc56f66f36f00c068afed391e360667d0f6180
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to game hacking and free in-game currency, specifically targeting popular games like Roblox and Coin Master. The primary lure is to trick users into clicking these links, which likely lead to credential harvesting pages or further malware downloads. The ML classifier strongly indicated maliciousness, and the embedded URLs are consistent with a phishing or scam campaign.

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/431946152/how-to-hack-roblox-accounts-2021-game-hack PDF link annotation
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/coin-master-today_GM406889139.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/roblox-ban_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/mcpe-client_GM479516143.pdfIn PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/roblox-fun-com-free-robux_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
stream_003_off00004a43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A43 24936 bytes
SHA-256: 530b011065ac359c435352b9cf6062460bc92641cf799d0d7371cdd2754cc78a
font_01_sfnt_off000083ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EE 18992 bytes
SHA-256: 91904dcb98687fcf58c7b52e545a9fbf658b3e4d1998331468638ebaf1d03505

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