Malicious PDF — malware analysis report

Static analysis result for SHA-256 5421b2fdbeba1a47…

MALICIOUS

PDF

44.5 KB Created: 2021-05-20 00:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1627b70e4162876906c9639b4d125008 SHA-1: bef3bd9b5664a67c7e936eab6a328195efcb345f SHA-256: 5421b2fdbeba1a479671594dd29ded94d2e4dcc085eba6609be3a0bf94cc0c57
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a primary URL that all point to websites promising game hacks and generators, indicating a social engineering lure. The heuristic 'SE_BROWSER_INSTALL_LURE' further suggests the document encourages users to install software or updates, a common tactic for malware delivery. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/406889139/coin-master-hack-online-generator-without-human-verification-game-hack
    • http://galletta.com/images/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://galletta.com/images/free-robux-exe_GM431946152.pdf
    • http://galletta.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://galletta.com/images/coin-master-spin-hack-apk_GM406889139.pdf
    • http://galletta.com/images/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://galletta.com/images/coin-master-hack-ios-without-verification_GM406889139.pdf
    • http://galletta.com/images/free-minecraft-pe-server_GM479516143.pdf
    • http://galletta.com/images/coin-master-spins-hack-2021_GM406889139.pdf
    • http://galletta.com/images/roblox-hack-ios_GM431946152.pdf
    • http://galletta.com/images/minecraft-switch-free_GM479516143.pdf
    • http://galletta.com/images/roblox-free-robux-no-verification_GM431946152.pdf
    • http://galletta.com/images/free-premium-roblox_GM431946152.pdf
    • http://galletta.com/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://galletta.com/images/coin-master-hack-tool-exe_GM406889139.pdf
    • http://galletta.com/images/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://galletta.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://galletta.com/images/how-to-earn-free-spins-coin-master_GM406889139.pdf
    • http://galletta.com/images/gold-card-coin-master-free_GM406889139.pdf
    • http://galletta.com/images/roblox-free-clothes-girl_GM431946152.pdf
    • http://galletta.com/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048af.bin
074337a163dd46a8cdc8dc0bb3267d42d5e62288e65ed31015171dc210ae7321		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AF 24412 bytes
font_01_sfnt_off00008058.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8058 2840 bytes
font_02_sfnt_off00008a0a.bin
cd935613fc622552088d026563d3601a20192ff4529e6ad67866ad1470b7d2d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0A 18688 bytes

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