Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ff2750b2c34858…

MALICIOUS

PDF

45.5 KB Created: 2021-05-15 00:00:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dc780c5519e20a20b467222941588b01 SHA-1: dc91995a938379a722272497edd10ebf1e6f2b28 SHA-256: f1ff2750b2c34858c41877283f8c3caf98b366b860b688f78e3d54fc90552e0a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are structured as SEO-optimized URLs pointing to external resources. The document body and heuristics indicate a lure for free in-game items, suggesting a phishing or malware distribution scheme. The primary URL identified is https://netcdn.xyz/app/406889139/free-pet-treats-coin-master-game-hack.

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/406889139/free-pet-treats-coin-master-game-hack
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-twitter_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/minecraft-free-online-unblocked_GM479516143.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-freebies_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-android_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-characters_GM431946152.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/pro-free-spins-coin-master_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/minecraft-svg-free_GM479516143.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-hack-codes_GM431946152.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/cheating-hacks-for-coin-master_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hacks-iphone_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-save_GM406889139.pdf
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-gfx-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004db5.bin
9b0bd0a81d266f5dfe80dd511a2f0792d01a1403a035eac55c7c66c52f2da0f2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB5 25180 bytes
font_01_sfnt_off000086ba.bin
601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BA 2920 bytes
font_02_sfnt_off000090d4.bin
276a5511e926ade4da3bb644615f667fa3bbb56bd99d2adc923a65479c9a9e34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D4 17864 bytes

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