Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac24425a953c48e6…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 11:34:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 69752ca5d157c0b9e9486279c073a5a9 SHA-1: 6ecb6993e6642355d4354aaed98f79c2a19d6919 SHA-256: ac24425a953c48e68fe4932f69ef0dc46ebd8f949a0cc96cbc5e2a10c56df642
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to game-related hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO poisoning attempt. The primary URL 'http://netcdn.tw/app/406889139/fbchampion-game-hack' is likely the intended destination for downloading a payload. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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/fbchampion-game-hack PDF link annotation
    • http://www.perpusffup.or.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/roblox-eliminating-wall-hacks_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/how-to-get-8-robux-free_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/hacks-for-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/free-catalog-roblox-ja_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/new-roblox-retail-tycoon-hack-exploit_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/roblox-twisted-murderer-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/top-10-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpusffup.or.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E 22388 bytes
SHA-256: 2f2d0c4e3a4e74c6ca98c187723aed29c46acb76c8ae9afa926568edfc5b4b70
font_01_sfnt_off00006060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6060 18656 bytes
SHA-256: fb679c9250522cab0344be15c9898f12ed930a7de6dfe2591d59bad5f2ca43f7

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