Malicious PDF — malware analysis report

Static analysis result for SHA-256 051fb38a9d3ed731…

MALICIOUS

PDF

37.3 KB Created: 2021-06-28 13:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b73c3f69a5c8c469c0ab566180d65efa SHA-1: 1e795fb719b66d8893e9db583e97bc572bbbb709 SHA-256: 051fb38a9d3ed7316d48eb4ed924d8c9b53ceaa0e9d22a1dd8aa7747676842a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'generators' for popular games. The primary redirector URL is http://netcdn.co/app/431946152/roblox-cheat-island-tribes-game-hack. This indicates a phishing or scam campaign designed to lure users to potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.co/app/431946152/roblox-cheat-island-tribes-game-hack In PDF document text
    • http://www.eucorro.com/arquivos/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-bloxburg-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/exploit-hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-giver-website_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-level-9-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-hack-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-free-admin-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/best-roblox-free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spin-link-list_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_off00003a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A7D 22580 bytes
SHA-256: 4c6f28fa260ee2f46d1d58547c494f451ab08f9cab2dc5618fd54c6f345984af
font_01_sfnt_off00006d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D05 19048 bytes
SHA-256: ee48ae29d582d2b851615c9876ab79971901b2ab01e9e4e3e68890c8796cd7a5

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