Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c8cdb640d00ff4…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 00:38:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5bcbf89f4c83532037a6cc05bc871ca8 SHA-1: b3c4c9c76706fb591d9bee0a8e10df9f4cd8d5cf SHA-256: d3c8cdb640d00ff4bc831571eba3c0b3419d979f6a2fd56c8b19cd945913b3e7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are structured as SEO-optimized PDF links pointing to pages related to game cheats and in-game currency. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The document's content and structure suggest it is designed to trick users into visiting malicious sites, likely to download further malware or engage in phishing activities.

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-phantom-forces-hacking-scripts-game-hack PDF link annotation
    • http://www.pspmrsmkber.com/opac/repository/how-to-hack-a-group-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-robux-card-no-humaon-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hire-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/robux-free-gift-card-org_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/how-to-hack-diamonds-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-girl-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkber.com/opac/repository/hack-coin-master-without-human-verification_GM406889139.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_off000031bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BD 21788 bytes
SHA-256: 79a76df42911679b71bdc23841a22c8e15aee7c1cc36e7aa5ac80ba0ad5aedeb
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 19800 bytes
SHA-256: beb76d74f609fd4178cb493640045e35b0e7db9f2fb7ba299377d7b046d6eadc

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