Malicious PDF — malware analysis report

Static analysis result for SHA-256 b141b2af0534919c…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 15:35:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f412cfde70101c69732f03edcf42fb5b SHA-1: 63e37045105ac89e250f98ab8de575fc3c9ae009 SHA-256: b141b2af0534919c8e84f5555ff7c62b2ad7d339471c993607cd84f66c8af8ac
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs that form a link farm, likely intended to redirect users to malicious sites for downloading further payloads. The document body explicitly mentions 'Free Robux' and 'Roblox Generator', indicating a lure for game-related scams. The presence of external URIs and a high ML score strongly suggests malicious intent, likely related to phishing or malware distribution.

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/free-robux-safe-game-hack
    • http://pro-graphite.com/images/coin-master-heaven-links_GM406889139.pdf
    • http://pro-graphite.com/images/what-is-a-minecraft-client_GM479516143.pdf
    • http://pro-graphite.com/images/create-minecraft-server-free_GM479516143.pdf
    • http://pro-graphite.com/images/how-to-get-free-robux-codes_GM431946152.pdf
    • http://pro-graphite.com/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://pro-graphite.com/images/free-coin-master-gifts_GM406889139.pdf
    • http://pro-graphite.com/images/hack-coin-pro-coin-master_GM406889139.pdf
    • http://pro-graphite.com/images/free-robux-no-verification-at-all_GM431946152.pdf
    • http://pro-graphite.com/images/coin-master-cheats-and-hacks_GM406889139.pdf
    • http://pro-graphite.com/images/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://pro-graphite.com/images/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://pro-graphite.com/images/free-coin-spin-coin-master_GM406889139.pdf
    • http://pro-graphite.com/images/coin-master-free-spin-daily-link_GM406889139.pdf
    • http://pro-graphite.com/images/robux-sign_GM431946152.pdf
    • http://pro-graphite.com/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdf
    • http://pro-graphite.com/images/coin-master-hack-355_GM406889139.pdf
    • http://pro-graphite.com/images/roblox-redeem_GM431946152.pdf
    • http://pro-graphite.com/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • http://pro-graphite.com/images/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://pro-graphite.com/images/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004922.bin
6d96f431cdbafb3f6f8f489930ff4313efb374496292cb30e0921ebe384bc356
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4922 26416 bytes
font_01_sfnt_off000085e6.bin
393a0339ec2761f14ea9b29efa8c9c5fc9788b4979bd41a030a3ecef46023b5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E6 18244 bytes