Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c29f734e5e1eb20…

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 12:49:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d202b82a10b01744d6ce3dc7534a1054 SHA-1: 4845edfd18665dd8742831167846f2d721e07e69 SHA-256: 3c29f734e5e1eb20ebfdc6427026e4b0af3cc7baecacb5d03022a8edd89ccba5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically promoting 'game hacks' and 'generators' for popular games. The primary redirector URL is https://netcdn.tw/app/431946152/what-is-the-cheat-t-get-robux-game-hack, which is associated with malicious activity. The document body, though heavily obfuscated, contains references to similar URLs and appears to be designed as a lure to entice users to click on these links, likely leading to phishing pages or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/what-is-the-cheat-t-get-robux-game-hack In PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/hack-robux-roblox-2021-funciona_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/farmtown-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-catalog-items-roblox-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-hack-download_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/pubg-uc-and-skins-smm-panel_GM1330123889.pdfIn PDF document text
    • http://io24.com.ar/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://io24.com.ar/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-youtube-video_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-link-today-hack_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
stream_004_off00004de1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE1 25720 bytes
SHA-256: 4b5834973d386d8b6084da3eb0eeb12d08543f8f4c663e19ed59c1ff4b190a5c
font_01_sfnt_off000089af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AF 18548 bytes
SHA-256: b74832bb260cf6fc562aaadd3a1df0b635b7da55c6d3130c07d633677bb31d19

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