Malicious PDF — malware analysis report

Static analysis result for SHA-256 4555befa0e91655e…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 01:54:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1804a4b94a016476060bc6d3d0bfe9ad SHA-1: c15bfa93088d6c55e26d2a266e82254b4bb40e8d SHA-256: 4555befa0e91655e62c296669960f78a769a4aab02a5e7758c3e54a69fc004f1
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 'free Robux' and 'Coin Master' rewards, indicating a lure for game-related scams. The ML classifier and PDF heuristics confirm the malicious nature, likely leading to a malicious website or download.

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-free-robux-2021-no-survey-game-hack
    • https://encounternepal.com/userfiles/files/coin-master-daily-bonus_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/best-free-minecraft-texture-packs_GM479516143.pdf
    • https://encounternepal.com/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/jailbreak-free-phone-calls-roblox_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/minecraft-ps4-code-free_GM479516143.pdf
    • https://encounternepal.com/userfiles/files/how-to-get-free-roebucks_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/robux-today_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/minecraft-life-hacks_GM479516143.pdf
    • https://encounternepal.com/userfiles/files/free-gold-cards-in-coin-master_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/real-minecraft-for-free_GM479516143.pdf
    • https://encounternepal.com/userfiles/files/coin-master-hack-online-without-human-verification_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/robux-hack-tools_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/minecraft-hacks-xbox_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b8.bin
192f3d554629aae958f745b0ba8cc79c747dc5e3827119e6b4751e5ee3b5891e
pdf-font-stream PDF embedded font (sfnt) at offset 0x30B8 21984 bytes
font_01_sfnt_off0000613c.bin
bfcc669c8c008b22e9f868ff4814dd8ce281145be7b6545b4eeabe5f200816fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 19680 bytes