Malicious PDF — malware analysis report

Static analysis result for SHA-256 449da31eed0b4fe9…

MALICIOUS

PDF

44.4 KB Created: 2021-06-09 06:29:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a4de119309b787371063ee677d045b46 SHA-1: 2bb264929b9eef28ea437f5924d32f7b9a7172d2 SHA-256: 449da31eed0b4fe97b4edb075a8306a518af285e69ba06ec2b6e9e08c4103392
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 game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to distribute malicious content or redirect users to phishing sites. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/431946152/game-empire-tycoon-roblox-hack-script-game-hack PDF link annotation
    • http://behsanroshd.com/images/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/roblox-phantom-forces-hack-2021_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/roblox-cheat-engine-table-2021_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://behsanroshd.com/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://behsanroshd.com/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004daa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DAA 25508 bytes
SHA-256: 08c094f807bc0596e52f85d8bcdba06b9402fe4afd95a6b03f505a8554caa901
font_01_sfnt_off000088a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A6 19020 bytes
SHA-256: 0e3e33e311133c290602f0eec4466a0354913ecf6aa3c24c231a0e471a41b52d

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