Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eef8e58f3d33b7d…

MALICIOUS

PDF

36.3 KB Created: 2021-07-01 20:04:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2e69e2be247646a85e5a6e69dcaf4e71 SHA-1: a0216b39b7256ef1b0297d8cfba6bbb052f8db66 SHA-256: 3eef8e58f3d33b7dd22fba9a1f8d609716eedc96478ad5bf631fac4626171b88
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are SEO-optimized PDFs with titles related to game hacks and free currency, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic and the ML classifier's high confidence further support malicious intent. The document body, though partially corrupted, contains URLs and phrases like 'Free Robux In 5 Seconds' which are common social engineering lures.

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/free-robux-in-5-seconds-game-hack PDF link annotation
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-raps-for-auto-rap-battles-for-roblox-list_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/enchantix-high-royale-high-roblox-hack-baking_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-terminal-railway-admin-train-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-roblox-bot-account-dump_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/nathorix-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-in-game-tyoe-your-password_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/games-on-roblox-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-free-robux-generator-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/cheat-code-roblox-gratuit_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-no-human-verification-or-survey-2021-on-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/money-hack-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35F9 22720 bytes
SHA-256: fe0ba166ff4de91d8c490291fe6b028477b604ae6353343b857aabb52799f36e
font_01_sfnt_off000068da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DA 19024 bytes
SHA-256: 32e885cda9f22d478afc316544d2df449eb2e753587968e7996ebff1e2e236eb

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