Malicious PDF — malware analysis report

Static analysis result for SHA-256 c950db95b8925795…

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 11:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 13672ff576c50509f2cdb9e31ad28bb0 SHA-1: 5b3029d4d7fe5a1901140a184761a2fdd8cca06c SHA-256: c950db95b892579588fafad4cbfafb053d1aec8fde54cb79574a99ee2121bda1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that point to external resources. These links are designed to lure users into clicking on them by promising free in-game currency or items for popular games like Coin Master and Roblox. The presence of a machine learning model flagging the PDF as malicious and the sheer volume of external links suggest a high likelihood of this document being used for phishing or to distribute further malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/coin-master-free-spins-link-whatsapp-group-game-hack
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-hacks-that-work_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/legit-free-spins-coin-master_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-robux-generator-without-verification_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-items_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-minecraft-texture-packs_GM479516143.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-2021_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/coin-master-fan-page-facebook_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-coin-master-hacks-no-verification_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/sites-to-get-free-robux_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-robux-exe_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/robux-in_GM431946152.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/clean-master-coins-hack_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdf
    • https://learning.mtsalmuhtadin.sch.id/__statics/gudangsoal/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004df6.bin
3e4c4ab818817609a285c53183056eacaf02deef79bb556695ebc44246bb54bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF6 25004 bytes
font_01_sfnt_off00008626.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8626 2840 bytes
font_02_sfnt_off00008fd7.bin
e17242fb732615db3af82b15b0eb94d62c2cda97be0a738ea92ad14a310048ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD7 18560 bytes

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