Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50345c82b016e95…

MALICIOUS

PDF

29.6 KB Created: 2021-05-17 11:35:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eaa1107b96cad144bfc7e8a4322582ea SHA-1: 962ad42df51e054c00e282471e75ce75f90964f5 SHA-256: e50345c82b016e953c8a23ebe60dbf8d32f8de7acff1a26621da7bf3f5a6315f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links to known malicious redirectors and lures users with promises of free game currency or hacks. The embedded URLs likely lead to further malicious content or exploit kits. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 3

  • 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.
  • 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/431946152/can-i-get-free-robux-game-hack In PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/roblox-sued_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/robux-today_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A09 19297 bytes
SHA-256: 718aada4df762cffee39d9787ec0d60d2acb0a23fa1cc4e3594c583bd5c40693