Malicious PDF — malware analysis report

Static analysis result for SHA-256 519c3a81e6f99105…

MALICIOUS

PDF

33.9 KB Created: 2021-06-26 20:42:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c0bc89aa28c76d6c193c269443c94800 SHA-1: 12ac52c007fb15e1dffcef0c2bdba7916ff571a4 SHA-256: 519c3a81e6f991055ae0083c0ce71be88e8ab79e21e7f65135e753a1d2274af0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are presented as downloads for game cheats and hacks. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs suggest a lure to download potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/431946152/roblox-hack-jjsploit-game-hack PDF link annotation
    • http://ggmtc.net/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-variable-modifier-script-cheat_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-hack-v6-5-download_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/www-robux-com_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.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
font_00_sfnt_off00002c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C28 22588 bytes
SHA-256: 5678d07536879f52386b808a25e0cabac5f26cfdc9d5dbff60fd8503598c4d4f
font_01_sfnt_off00005e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 19408 bytes
SHA-256: a4bcf697b50ffcc5175d661b596f963b7dd232b05fe7e0e238065a49e0073fc4

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