Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e08e4679ad6758…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 04:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9b5e619c9aa77bcf219e4b1a17b4643d SHA-1: 7a344d51a265ad6ff1cd413e1f5565eb66bc351a SHA-256: e9e08e4679ad67587f33e585f6331075ed2c0290e9ab48db687497e5dcc01703
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, forming a link farm, and a prominent call-to-action related to 'free Robux'. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a redirection to potentially malicious sites. The document's content and structure indicate a scam or phishing attempt, likely to trick users into visiting compromised websites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-any-verification-game-hack
    • http://bressanassessoria.com.br/images/coin-master-free-link_GM406889139.pdf
    • http://bressanassessoria.com.br/images/free-coins-coin-master-today_GM406889139.pdf
    • http://bressanassessoria.com.br/images/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://bressanassessoria.com.br/images/how-to-get-free-robux-fast_GM431946152.pdf
    • http://bressanassessoria.com.br/images/free-minecraft-coloring-pages_GM479516143.pdf
    • http://bressanassessoria.com.br/images/coin-master-free-spin-ml_GM406889139.pdf
    • http://bressanassessoria.com.br/images/free-robux-no-verify_GM431946152.pdf
    • http://bressanassessoria.com.br/images/hack-my-spins-coin-master_GM406889139.pdf
    • http://bressanassessoria.com.br/images/how-to-get-hacks-on-roblox_GM431946152.pdf
    • http://bressanassessoria.com.br/images/coin-master-hack-tool-no-human-verification_GM406889139.pdf
    • http://bressanassessoria.com.br/images/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • http://bressanassessoria.com.br/images/rape-simulator_GM431946152.pdf
    • http://bressanassessoria.com.br/images/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://bressanassessoria.com.br/images/easy-robux-today-com_GM431946152.pdf
    • http://bressanassessoria.com.br/images/free-robux-2021_GM431946152.pdf
    • http://bressanassessoria.com.br/images/latest-free-spin-coin-master-daily_GM406889139.pdf
    • http://bressanassessoria.com.br/images/free-robux-with-no-verification_GM431946152.pdf
    • http://bressanassessoria.com.br/images/coin-master-spins-2021_GM406889139.pdf
    • http://bressanassessoria.com.br/images/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://bressanassessoria.com.br/images/coin-master-free-coins-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000477e.bin
f0e39821f04632947ddb0017975e16fc3ce42a852436b7ea54e7fcc185cf3bd6
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x477E 24984 bytes
font_01_sfnt_off0000812c.bin
301178d570ed694c8643ac68529098fd95120b57f2db1b64df12e7fbf37d492f
pdf-font-stream PDF embedded font (sfnt) at offset 0x812C 19308 bytes