Malicious PDF — malware analysis report

Static analysis result for SHA-256 73670aedc094c74b…

MALICIOUS

PDF

36.2 KB Created: 2021-07-06 17:09:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 269cc8c19fb1f9cea6b37a5aad771fd3 SHA-1: 69f6fd7bf4b439b83cff2e19dbd9ed93c7333814 SHA-256: 73670aedc094c74bcc400b3c7d61b3c7d8cf2bb35d115dc4c34c91af0f18650b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a URL in its body, all pointing to websites offering free spins for Coin Master, Roblox hacks, or Minecraft cheats. This suggests a phishing or scam attempt to lure users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm, further supporting a malicious intent.

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/406889139/coin-master-free-spins-link-blogspot-2021-game-hack
    • https://biospray-online.com/ckfinder/userfiles/files/can-simeone-hack-your-roblox-account-theough-discord_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/free-robux-hack-no-survey-no-download-2021_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/coin-master-hack-2021-app-download_GM406889139.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/minecraft-hacks-115-2_GM479516143.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/minecraft-mac-free_GM479516143.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/coin-master-online-hack-no-human-verification_GM406889139.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/hack-to-get-unlimited-robux_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/how-to-get-free-robux_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/weight-lifting-simulator-roblox-hack_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/minecraft-java-edition-key-free_GM479516143.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/roblox-free-hats_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/roblox-pjj-hacks_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/free-robux-legit_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/how-to-cheat-on-robux-to-play-game-2021_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/box-prizes-free-robux_GM431946152.pdf
    • https://biospray-online.com/ckfinder/userfiles/files/coin-master-free-spins-youthnow_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000356d.bin
f7153540a97e4faefedcbbdc6728324ffa56d9cff10d318c5ea97a141ad59df1
pdf-font-stream PDF embedded font (sfnt) at offset 0x356D 22900 bytes
font_01_sfnt_off000068cc.bin
f868d1b4b008750abeb491aae720fc8315e02cd8dd3bcefbbcb1193d1ab016b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC 19036 bytes