Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25481334f063fd7…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 17:38:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 54c8837043b8c5670eb71596f5630255 SHA-1: 74fa60f1750b38a4788cff72d68a6593f1cdeddf SHA-256: c25481334f063fd79df5a1418e1efacd5468df37a92c78ff6a49b0a0ba293d4e
102 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to files with names suggesting game cheats or free in-game currency. One prominent URL, 'https://netcdn.xyz/app/479516143/wurst-client-1.12-2-game-hack', likely serves as a download for a game modification tool. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to distribute various malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/wurst-client-1.12-2-game-hack
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/roblox-free-robux-com_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/minecraft-java-free-download_GM479516143.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/roblox-gift-card-for-free_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/aternos-free-minecraft-server_GM479516143.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/hacked-client-for-minecraft-bedrock_GM479516143.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-reviews_GM406889139.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/how-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/minecraft-hacked-apk_GM479516143.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/coin-master-daily-spin-free_GM406889139.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/free-spin-and-coin-links_GM406889139.pdf
    • https://elearning.mtsn1lampungbarat.sch.id/__statics/gudangsoal/files/get-free-robux-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cb4.bin
1e463c68984e2779925033517ded998a13251467f04dfae3fc4fafb9ab7a5791		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB4 24292 bytes
font_01_sfnt_off00008443.bin
311fa6a3c8ed3152b86259a6f2b4fd65ad6ae6b737d77785fc3ef6c3d9292616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8443 18048 bytes

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