Malicious PDF — malware analysis report

Static analysis result for SHA-256 d546488c70a7f2b9…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 23:16:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0998ddb81638b598086f303075a8e47f SHA-1: 6a676a83ac96541a9aedec5c55fda9af4219f024 SHA-256: d546488c70a7f2b9bf859adf563d890751eeedada28d4573918f85961dbcd269
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that lead to websites promising free in-game items or accounts, indicative of a phishing or scam campaign. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the document's structure and embedded links point towards a social engineering attack designed to trick users into visiting potentially harmful sites.

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.tw/app/479516143/free-minecraft-account-reddit-game-hack
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-coin-master-spins-link_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/how-to-get-a-gamepass-on-roblox-for-free_GM431946152.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/free-op-minecraft-servers_GM479516143.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/how-to-become-free-robux_GM431946152.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/como-hackear-coin-master-2021_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/coin-master-free-spins-link-download_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/hack-initiate-unlimited-free-robux-40m_GM431946152.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/gamesofficenet-hack-coin-master_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/minecraft-free-download-android-apk_GM479516143.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/cheat-mod-roblox_GM431946152.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/minecraft-bedrock-edition-free_GM479516143.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://muliadarmapratama.ac.id/perpus.muliadarmapratama.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000037fd.bin
f24171a44b8b26a6464020660edf126e57184f7ee324d480c2262bae0264be97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37FD 22732 bytes
font_01_sfnt_off00006ace.bin
8dbef7c4e74fa4cb7ddd765f7d4b87c2be805150d274016986a9d28ec8854e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACE 18312 bytes

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