Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd548d94016c8998…

MALICIOUS

PDF

53.6 KB Created: 2021-06-09 01:36:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c4c21365b60989635b5581fd2a2e6b56 SHA-1: 30d2497e15085df381b3486ddd6b9323878a9b27 SHA-256: cd548d94016c8998f714f1c0a4f6e42d3b6dd4265418212939543352340c9584
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a "download button" lure, directing users to external sites that host game hacks. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to distribute malware or facilitate phishing. The primary attack vector appears to be social engineering via a fake download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9577

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.tw/app/431946152/roblox-jailbreak-hack-july-2021-game-hack
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-tiktok-likes-generator_GM835599320.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/hacks-for-roblox-prison-life_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-for-free-apk_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-games-like-coin-master_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-hack-pc-free_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-free-spins-that-really_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-cheats-2021_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-daily-free-spins_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-hurry_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-views-on-tiktok_GM835599320.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/is-minecraft-java-free_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/adopt-me-roblox-hacks_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-hack-no-verification_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/robuxlove-net-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000558a.bin
b2cc1b3dad9a5a1209df8a649a9169c75209b198b15ce19431f151f7049e0b96		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x558A 27524 bytes
font_01_sfnt_off00009523.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9523 2824 bytes
font_02_sfnt_off00009ecd.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ECD 5696 bytes
font_03_sfnt_off0000abdf.bin
1ad56ad7bff88076e4e727e00e5723f929794f626ff935900c94ae949bbd8b66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABDF 19188 bytes

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