Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4355cab43bc360c…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 13:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 33644f67a446b02635844c1c734d55a4 SHA-1: 0953b8cc8ea446fd2db06a86bccd78dba4ce995e SHA-256: a4355cab43bc360c84d8a0fe79c32bd30f953b2eeb38ba86885a50c778477282
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are SEO-optimized pages offering hacks or cheats for popular games. The document body explicitly mentions 'Coin Master Hack 2021' and includes a direct URL to a download, indicating a lure for potentially malicious software. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-2021-no-human-verification-game-hack
    • https://stmik-kharisma.ac.id/perpustakaan/repository/is-coin-master-hack-safe_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-coins-for-coin-master_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/pokemon-go-free-event_GM1094591345.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/robux-free-illimited_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-robux-for-kids-no-verification_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-roblox-gift-card-codes-2021-march_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/descargar-roblox-walk-speed-hack_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-hack-robux-with-cheat-engine-2021_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-robux-generator-2021-no-survey_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-player-radar-hack-site-https-v3rmillionnet_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/counter-blox-roblox-offensive-hack-script_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/sites-for-free-spins-for-coin-master_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-attack-on-titan-cheats_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/get-free-robux-com_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/claim-coin-master-free-spins_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/daily-free-spins-on-coin-master_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/is-it-possible-to-get-free-robux_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-hacking-website_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031e4.bin
62c7712f89fdec3d3e1725bcd72888cbcc286cce8fc615e7bf8569885682bdce		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E4 23436 bytes
font_01_sfnt_off0000670a.bin
8b81128e4d8c0a52c4f795b94b8e9f316ec6df4c85cd77aec984460d7bda85ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670A 18940 bytes

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