Malicious PDF — malware analysis report

Static analysis result for SHA-256 15abb7d0e07a5151…

MALICIOUS

PDF

35.5 KB Created: 2021-07-09 08:26:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5451393eaad29e73d6230383d0721911 SHA-1: 32466bb464e157dd11bbe7927eb6aea4c3105934 SHA-256: 15abb7d0e07a5151ac205882eae981588fcee70839a8be67e6eb2b56f6e340b1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple embedded URLs and a document body that explicitly advertises "free Robux hack" and "Coin Master free spins", indicating a lure for users to download potentially malicious files. The presence of external URIs and an IP literal in the document, coupled with a high ML classifier score, strongly suggests malicious intent. The document likely serves as a dropper or a phishing lure to trick users into downloading further malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/howto-get-free-robux-hack-javascript-game-hack
    • http://110.78.114.242/ckfinder/userfiles/files/rbx-place-free-robux_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-claim-spins_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-gold-cards-free_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-jailbreak-hack-download-2021_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/slurp-hack-roblox_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/freespinandcoin-blogspot-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-hack-to-get-free-robux-2021_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/hack-para-sharkbite-roblox_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-robux-adopt-me_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-mod-version-free-download-34-4_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/roblox-free-items_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/get-free-robux-app_GM431946152.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
    • http://110.78.114.242/ckfinder/userfiles/files/free-rare-cards-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003181.bin
190f1d23cb95e8637a73ae86eca602f3a0ff9327647eb167d75b471d0036d3ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x3181 22424 bytes
font_01_sfnt_off0000638f.bin
5777ae4f956c17b7a23d5cc1d4a6e9839917cc75380a892778f1d4bb935e7c32
pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 19728 bytes