Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83a2552fdcebbf0…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 04:02:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c71c34c9b7b33fafc8430118a24f4b61 SHA-1: ab3cef120fc43622f0a3a01fdd179d4c7c97a324 SHA-256: c83a2552fdcebbf0af87109ec4c73e79b054b5b6a4ef1d94da74661cb15133e2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm heuristic, indicating it is designed to redirect users to external sites. The document body and extracted URLs suggest a lure related to game cheats and hacks, specifically for Roblox and Minecraft. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links points towards a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-jump-hack-code-game-hack PDF link annotation
    • http://www.dciprotection.ca/images/how-to-get-free-robux-on-a-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/como-hackear-cualquier-cuenta-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-robux-scam-sites_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/elysian-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/roblox-free-unlimited-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.dciprotection.ca/images/get-free-shirts-roblox-nbc_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-robux-if-u-join-this-group_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/how-to-get-free-vip-in-roblox-fe2_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/quick-way-to-get-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-exploits-for-roblox-2021_GM431946152.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
font_00_sfnt_off00002fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAE 23204 bytes
SHA-256: 0528299f0d2b16ff931b969f5ab0e39c2037681fd2dbc8cbe33238a4c857963e
font_01_sfnt_off00006436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6436 19572 bytes
SHA-256: c056a83e7b40279615d47ed5ac6bef5d182190e769ab3432b27987fb0a848390

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