Malicious PDF — malware analysis report

Static analysis result for SHA-256 6765c9d2090a85f8…

MALICIOUS

PDF

45.6 KB Created: 2021-05-16 00:07:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94a09ce531f2c45757b5707cb1cdcaf0 SHA-1: deca5614fce34e8b56833edb02104214d9f74337 SHA-256: 6765c9d2090a85f8c85b550bd3dea607b70cb12b5bb5adca70cbe26736d1758c
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 promising free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple URLs like 'https://netcdn.xyz/app/431946152/free-100-robux-game-hack' strongly suggest a phishing or malware distribution attempt. The document body, though partially corrupted, contains similar lures and the primary malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/free-100-robux-game-hack
    • https://pa-pangkalpinang.go.id/images/free-robux-survey_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/how-to-hack-to-get-robux_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-free-spins-app_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/free-spins-coin-master-hack-2021_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/free-robux-hack-no-verification_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-daily-rewards_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-hack-fast-org_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/robux-free-robux_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/free-coins-coin-master-iphone_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/roblox-got-talent-piano-hack_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/blox-supply-free-robux_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/free-robux-generator-for-kids_GM431946152.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-hack-app-2021-download_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdf
    • https://pa-pangkalpinang.go.id/images/minecraft-xbox-one-code-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf6.bin
93bc5f5dc3767d72703d451f10b325c9e36406873da0d11a8f9073923088023b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF6 25584 bytes
font_01_sfnt_off000085e2.bin
baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E2 2844 bytes
font_02_sfnt_off00008fa3.bin
ade71c57547996cc2793a44f7be3e933a3a5664d4c8f362da863e6c031d51f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA3 18292 bytes

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