Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8b8cabdb7109b7…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 14:39:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2d44d6d2d415dc8c79dbec6aa40b1d25 SHA-1: 947ba015ea97f4e853c23eb798ccfcbc753f0491 SHA-256: 1c8b8cabdb7109b75978a19f350afca940aea753a726f8b507a3b33a16346a4c
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 structured as SEO-optimized PDF links, suggesting a link farm. One prominent URL, https://netcdn.xyz/app/406889139/hack-coin-master-apk-3.2-download-game-hack, is presented as a download for a game hack. The presence of a "download button" heuristic further supports the malicious intent of directing users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/hack-coin-master-apk-3.2-download-game-hack
    • http://loriginedupain.org/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdf
    • http://loriginedupain.org/images/how-can-you-get-free-robux_GM431946152.pdf
    • http://loriginedupain.org/images/game-give-free-robux_GM431946152.pdf
    • http://loriginedupain.org/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdf
    • http://loriginedupain.org/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • http://loriginedupain.org/images/free-minecraft-java-server_GM479516143.pdf
    • http://loriginedupain.org/images/free-robux-2021-no-verification_GM431946152.pdf
    • http://loriginedupain.org/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdf
    • http://loriginedupain.org/images/coin-master-free-spins-daily_GM406889139.pdf
    • http://loriginedupain.org/images/coin-master-hack-apk-iphone_GM406889139.pdf
    • http://loriginedupain.org/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://loriginedupain.org/images/gameoffice-net-hack-coin-master_GM406889139.pdf
    • http://loriginedupain.org/images/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://loriginedupain.org/images/free-coins-and-spins_GM406889139.pdf
    • http://loriginedupain.org/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://loriginedupain.org/images/hacks-for-minecraft-bedrock_GM479516143.pdf
    • http://loriginedupain.org/images/free-robux-without-downloading-apps_GM431946152.pdf
    • http://loriginedupain.org/images/roblox-pink-free-robux_GM431946152.pdf
    • http://loriginedupain.org/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdf
    • http://loriginedupain.org/images/coin-master-heaven-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047fb.bin
bbfa14a964d014130e7031c116fd419ccbcf53947fcbd6c1af6c6d353591ae4e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47FB 24660 bytes
font_01_sfnt_off000080d1.bin
d746a7c1c5cf5be311eddf8676cfb9402845d24e0d8fc8e00b27a1d9de62f851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D1 18836 bytes

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