Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d07da3f0663f97…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 01:06:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 61b8d7e78d44d03d1f575a93a908e2f3 SHA-1: ec9fd088e7c95ca129ce2d0302df716cccd68a64 SHA-256: a2d07da3f0663f978264f06d304fb66313d2cc195ef75babdf693824288c4202
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to known malicious redirector infrastructure, specifically promoting a 'Coin Master' game hack. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the document's structure and embedded URLs suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/moon-static-coin-master-generator-hacks-free-game-hack In PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-spin-link-daily_GM406889139.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_off000052fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FD 24424 bytes
SHA-256: 2763eff0a7e4e4690a0a847b8ced93750a27621da3748f989d1586badc3e3ff4
font_01_sfnt_off00008a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A25 17880 bytes
SHA-256: 12faecc5962592d277de3e4fe4bc4692cb4c94937b2745323735b12f582b8c4f

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