Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d5549a1491ae09…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 06:21:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ce7e438d219c2640cb649f6bfd97d36c SHA-1: 398b5b31336d1645267efa949e58bcea259ae0b2 SHA-256: 09d5549a1491ae09304d81766c29f8bdca6f63b56358528513854a35a3fe8398
160 Risk Score

Malware Insights

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

This PDF document employs a lure to trick users into clicking a link, disguised as a 'free generator / game hack'. The link redirects to malicious infrastructure, specifically http://netcdn.tw/app/406889139/free-spin-link-coin-master-today-game-hack, which is known for hosting malicious content. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-spin-link-coin-master-today-game-hack In PDF document text
    • http://www.salwangurgaon.com/files/roblox-catalog-free-headphones_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-bird-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-roblox-private-server-links_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-adopt-me-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/re-ghoul-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/how-to-hack-redwood-prison-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/como-tener-robux-hack-2021-funcionando_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-hacks-new-2021_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.salwangurgaon.com/files/free-robux-hack-no-human-verification_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
font_00_sfnt_off00002f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6E 22464 bytes
SHA-256: 12fa825708320b0d9aaf0e380376ae8d40f7be5cabd30f8ebe621a7743923abb
font_01_sfnt_off0000619f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619F 18696 bytes
SHA-256: 31881190b33b808cb817da8829c891faee4b93e4bfb09ae76d7fe90b75b9481b

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