Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8bfd377a6c09988…

MALICIOUS

PDF

41.7 KB Created: 2021-05-10 23:27:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b3f4434f88b806b8132eba8dadfb9ba1 SHA-1: e2242a16e7ed611cd83eeae34bb610aac0d887c5 SHA-256: b8bfd377a6c099883f4b332ba8df6f37da4e5bb853dd5c594c60c291370c660f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free currency, embedding multiple links to known malicious redirector infrastructure. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-attack-madness-hack-game-hack, which likely leads to further malicious content or downloads. The document's structure and embedded links strongly suggest a phishing or scam campaign aimed at tricking users into visiting compromised sites.

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/406889139/coin-master-attack-madness-hack-game-hack In PDF document text
    • http://agritrade-ukraine.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/demon-roblox_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://agritrade-ukraine.com/images/free-spins-coin-master-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_off00004a13.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A13 24384 bytes
SHA-256: 6b1e90c557311e4921f64cbff5d4a78a8ee6d09d2c926fbe1562c476eb578944
font_01_sfnt_off000081d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D2 17888 bytes
SHA-256: f7a53a65286f7c98125d4d45247e8746e7e120bffcc9c77c9c81cd5151e0f106

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