Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3379359b02c2ef6…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 07:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b68ceb124162f1f96161af9defeb086a SHA-1: c9678f623b4f70ca542ad99722765e0fe8cdb901 SHA-256: f3379359b02c2ef66da6913d9e3ff134ccc61606afffdedcf6e98a5fae772361
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be related to game cheats and free in-game currency, suggesting a scam or phishing attempt. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs points towards a potential redirection or download mechanism, likely intended to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/bloxawards-com-earn-free-robux-game-hack
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/roblox-executor-free-download_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/collect-robux_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/coin-master-online-hack-download_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdf
    • http://library.stieyapan.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/minecraft-ps4-code-free_GM479516143.pdf
    • http://library.stieyapan.ac.id//repository/coin-master-links-for-free-spins_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/get-free-robux-without-human-verification_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/how-to-get-unlimited-robux-2021_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/roblox-premium-free_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-for-kids_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/minecraft-tiktok-hacks_GM479516143.pdf
    • http://library.stieyapan.ac.id/repository/free-vip-server-roblox_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/coin-master-free-codes_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/coinmaster-rewards_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004eb5.bin
53e0216d6dffd6bc3a63efc77e3dd1a5c82707b2a34b3716e19b03d5881e5791		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EB5 25232 bytes
font_01_sfnt_off0000890f.bin
ad6cfd8b97476ff22bd965746e6d59def3dc1c42c07a754b956efad1c533161c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890F 18916 bytes

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