Malicious PDF — malware analysis report

Static analysis result for SHA-256 f395b6ef72d1f366…

MALICIOUS

PDF

46.5 KB Created: 2021-05-15 22:19:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2a9e77284fd1dc9e0484a6641241ab74 SHA-1: 2d2e3d646bd1575879acba59b9fb14c0108922bb SHA-256: f395b6ef72d1f36664857d45e48c8a08d73425bba9acccad421b1d6a13472704
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a high number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to distribute malicious content. One prominent URL, 'https://netcdn.xyz/app/479516143/minecraft-dungeons-download-free-game-hack', indicates a lure for downloading free game software. The ML classifier also flagged this PDF as malicious with a high score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/minecraft-dungeons-download-free-game-hack
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/hacks-to-get-free-robux_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-time-hack-ios_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/rbx-robux_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-accounts_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/robux-hack_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/download-minecraft-java-edition-free_GM479516143.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-daily_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/easy-robux-hack_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/free-roblox-hair-to-wear_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/real-free-spins-for-coin-master_GM406889139.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-real_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/what-is-a-robux_GM431946152.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • https://elearning.min1tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f56.bin
d2bc1e8a154ef7e836a9bf1a6f9698e9fb56274a74e1465ec079efe2431dca40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F56 24988 bytes
font_01_sfnt_off000087d9.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D9 2880 bytes
font_02_sfnt_off000091c3.bin
921efc7a282f70be8e45d9f485508adcbd6bee6f34856fa33b0668efabfdb805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C3 18720 bytes

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