Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b66e75fb60d1932…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 09:38:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e3e6c936e41ad6b3df606657edb3e6fc SHA-1: 3692393c586d7457ed01f09e4cdd98eedba80fee SHA-256: 3b66e75fb60d1932053c3e047294787677f3b931684db7f219c1fcbf5126b7b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures related to free game currency and hacks. The primary redirector URL is https://netcdn.xyz/app/431946152/can-you-get-robux-for-free-game-hack, which is associated with known malicious redirector activity. The document's content and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites.

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/431946152/can-you-get-robux-for-free-game-hack In PDF document text
    • http://fishboat.hr/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-hack-spins-and-coins-unlimited-free_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
font_00_sfnt_off000047f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F2 27480 bytes
SHA-256: 9f96d448e3ab8d36b9eea7f856e315f372ae9c14eaee82d81d3255b34163b173
font_01_sfnt_off00008634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8634 18508 bytes
SHA-256: c061b59ab901ec7c7e5d17bc5fec7ace191fd36e08e64edc0ca642be8bf86a0e

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