Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2784f35cc5aa0d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 20:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 68b1a1934e8c7b6180bbdc12c0602559 SHA-1: d2ab396687c27e48d729d0ada7a772951c99ab95 SHA-256: ac2784f35cc5aa0de3011139d4ade15ebc4695a6f04f3927c509b047ce675299
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free generators' or 'game hacks', a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of these lures suggests the document is intended to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded links point to a social engineering attack.

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-coin-spin-daily-link-net-game-hack PDF link annotation
    • http://bw.ac.th/userfiles/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/simple-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-roblox-accounts-with-robux-that-work-live_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/robux-hack-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hack-killer-for-new-superhero-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-with-only-username_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-stuff-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-version-ios_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
font_00_sfnt_off000030ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AC 22408 bytes
SHA-256: ab8b5f765e67e6896cce9729cef07f6ac77b64c1525baac9f5d81e36a5a9909f
font_01_sfnt_off00006285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 18768 bytes
SHA-256: 027a2273446011b1d36e6fb9144bde778dd1e9d38c4cdc6a117df2c4d13725ec

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