Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89efc83f25ebbd7…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 04:40:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bf4a951592f3d2dd61d77cbec0ef2717 SHA-1: cb6209abd3005788c9ddd1833ff7c1db6d00da6b SHA-256: d89efc83f25ebbd76be495be287a7b5778320cbbac2473cbb124a9a10f26eecd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for a game hack lure, directing users to a suspicious URL. The document body and embedded URLs reinforce this theme, indicating a phishing attempt to trick users into visiting a site that likely hosts further malicious content or exploits. The ML classifier also strongly flagged this PDF as malicious.

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/free-spins-coin-master-2021-game-hack PDF link annotation
    • https://www.sun-a.com/ckfinder/userfiles/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/coin-master-hack-version-download_GM406889139.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_002_off000030a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A0 23308 bytes
SHA-256: e00b219e17da40ee9c8f9b3d89c35b8c96b48698964d3f18b4ba6cc6dc92e363
font_01_sfnt_off00006525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6525 18576 bytes
SHA-256: 461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440

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