Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7db0c14e5825a6b…

MALICIOUS

PDF

42.2 KB Created: 2021-05-17 18:46:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8e6e431bb882283b342df951a2c3577c SHA-1: 86fdec80a4fd51f19c6af6901fd573daa3542652 SHA-256: c7db0c14e5825a6bd5c97a8686e78f63266c97a0fb7263db2d22ffa68f19e89c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The primary lure directs users to 'netcdn.xyz', which is flagged as a malicious redirector. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/roblox-a-game-hack In PDF document text
    • https://www.flexcable.com/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://www.flexcable.com/images/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.flexcable.com/images/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.flexcable.com/images/coin-master-free-spins-moonactive_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_off00004a27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A27 25120 bytes
SHA-256: 76d898ba59368819a78f612e43d8b1e80e1eb7da03b4645652ac11775f4c95b6
font_01_sfnt_off00008406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8406 17784 bytes
SHA-256: ecac86e2ebbcb5197ee90d5209091950a23223a632d77054b4fa777aef52a58d

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