Malicious PDF — malware analysis report

Static analysis result for SHA-256 763b4a16f20b442e…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 09:47:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2eb45cbc553b284df0fb4cfa4cd4a636 SHA-1: c16f0d8610add1f4cf341c6d396c75dada277e91 SHA-256: 763b4a16f20b442e58cb60ccc25de15a1eb11069efdec6636da15f79599067cf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, identified as a link farm, suggesting a tactic to drive traffic to other sites. The document body and extracted links indicate a lure related to 'Coin Master' game hacks and free spins, a common theme in phishing and scam campaigns. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/link-for-free-spins-on-coin-master-game-hack
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/today-coin-master-spin-free_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/juego-hackeado-de-coin-master_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-give-robux-on-mobile_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/hack-coin-master-game-apk_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-hacks-no-surveys_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/robux-2021_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/roblox-free-wings_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-gift-robux-on-mobile_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/is-roblox-hacked_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-daily-spins_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/www-roblox-com-robux-free_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/minecraft-free-trial_GM479516143.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/coin-master-time-hack-2021_GM406889139.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-robux-on-phone_GM431946152.pdf
    • http://wwlogistic.net/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050e3.bin
335c6e16c1895d8e87dc096104fa6e7752d72c35c9408c172eaf499c3db66cb3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50E3 25032 bytes
font_01_sfnt_off00008a30.bin
722d781e478cd0d1a4785e673d05427d87221dd2f44d1d4595ffa323240eece4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A30 18056 bytes