Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c86427b26b62c9…

MALICIOUS

PDF

35.7 KB Created: 2021-06-27 12:11:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b18e73058da2074aee41b6c0f22ec8f8 SHA-1: 124bf453934fff4efecbea93aeb4dc969f5fab94 SHA-256: a9c86427b26b62c9bb526e36f6721919cb671dd980e88679d80abe653386224c
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a link farm strategy to direct users to various game-related hack pages. The presence of numerous external links, including one pointing to 'roblox-how-to-speed-hack-not-patched-game-hack', strongly suggests an attempt to trick users into downloading or visiting potentially harmful content. The ML classifier's high confidence score further supports the malicious nature of this file.

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-how-to-speed-hack-not-patched-game-hack
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/roblox-com-redeem_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/tiktok-minecraft-hacks_GM479516143.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/roblox-redeem-card-codes-free_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/master-free-spin-and-coin-link_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-time-speed-hack_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/minecraft-games-to-play-for-free_GM479516143.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/mcpe-free-download_GM479516143.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-reviews_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/qa-roblox-hacks-azhdh-f-b_GM431946152.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-to-hack-m-coins-mcpe-master_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-trial_GM479516143.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/robux-free-promo-codes_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-meme_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003235.bin
d3186d1a844b15e830dae904962c92593e3c783b97f73aad1ec1bd47eb16f803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3235 22552 bytes
font_01_sfnt_off000064e3.bin
5a0bd1b15107fd10ddf6d8b64248f7b5cd4711f655698807c9117b33359b4160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 19596 bytes

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