Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45ec2a5c16ca6b7…

MALICIOUS

PDF

46.3 KB Created: 2021-05-11 20:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4bd131f300decf757f45c45dc7924000 SHA-1: 8cb180027fba1f051d681ad113e7fcf118b252c4 SHA-256: e45ec2a5c16ca6b7062bdb18836c31eceafd8d9c9b91106ce3a8d4a32604d668
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic to various potentially malicious sites. The document body, though heavily obfuscated, contains references to 'Robux Hacks' and a URL that further supports a lure for in-game currency. The presence of a download button heuristic reinforces the idea that the document is designed to trick users into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/431946152/robux-hacks-2021-game-hack
    • https://manmagelang.com/__statics/gudangsoal/files/cm-free-spins-and-coins_GM406889139.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/how-do-you-get-robux_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/no-robux_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/get-coin-master-spins-free_GM406889139.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/blox-fish-free-robux_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/free-robux-rewards_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/roblox-studio-free-download_GM431946152.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/minecraft-free-edition_GM479516143.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/minecraft-marketplace-free_GM479516143.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • https://manmagelang.com/__statics/gudangsoal/files/how-many-levels-are-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a14.bin
4167e954ea7b71d1a1dbaa0705ab25a41cb54c7ed0f77c18245083e7808f4cd4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A14 26060 bytes
font_01_sfnt_off00008740.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8740 2880 bytes
font_02_sfnt_off0000912a.bin
03ab0df94635c5ebeb05191dd2fda9aa410ed650044dc459735f8f7cc99ee4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x912A 18648 bytes

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