Malicious PDF — malware analysis report

Static analysis result for SHA-256 409a7b7375c69050…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 04:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 46922f3a635ba97858c015711750b880 SHA-1: f5e78dc421cb1002fe21c849fda50241abcfb46a SHA-256: 409a7b7375c69050374b16395c349facfe684196b5f7fcc22ef5d1f835040703
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The document body and extracted URLs focus on obtaining free in-game currency and items for popular games like Roblox and Coin Master. The presence of a PDF link farm heuristic indicates a large number of external links designed to appear legitimate but likely lead to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/how-to-get-robux-on-roblox-for-free-on-pc-game-hack
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coin-master-cheat_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-games-hack_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-minecraft-realm-codes_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/bank-tycoon-roblox-free-vip-code_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-gift-link-2021_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/pokemon-go-free-coins-generator_GM1094591345.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-2021-december_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-without-downloading-anything_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-spin-free_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-coins-coin-master-daily_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/pubg-74-uc_GM1330123889.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-things-on-roblox_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/best-free-hacked-client_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/tiktok-watch-free-movies_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003428.bin
a667ca3f7ae41917bd1d2e85af7cf5eedba6913e2bfc89415807dcabcefa9756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3428 22348 bytes
font_01_sfnt_off000065d0.bin
ff3d3beb29fa12d08135f19719dfe8f34c1b4656d8f197528264fbbdc7c60e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 19212 bytes

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