Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9b42a5b275bc37…

MALICIOUS

PDF

37.5 KB Created: 2021-06-27 03:03:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 914b2d0c665cd038aead093e4f41a48c SHA-1: 682412283249a6eb8b455d55b22cd12572208a3d SHA-256: cc9b42a5b275bc3726b261efdfcc7a9ffcccd840b707cd0d5e74a4b862230fdb
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a 'download button' lure, strongly suggesting a phishing or malware distribution attempt. The document body and extracted URLs indicate a lure related to game cheats and hacks, specifically for Roblox. The presence of a PDF link farm heuristic further supports the malicious intent to redirect users to external, potentially harmful content.

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.co/app/431946152/roblox-2021-cheat-engin-game-hack PDF link annotation
    • http://repository.ummy.ac.id/repository/roblox-bloxburg-free-money-hack-youtube_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/robux-for-free-2021-no-vertification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-knifes-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/robux-hack-no-download-or-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-roblox-without-getting-banned_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-free-mac-exploiter_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-free-stuff-for-your-avatar-in-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/i-sleep-roblox-hack-oh-shi_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-roblox-lumber-tycoon-2-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-for-life_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-adopt-me-building-hacks_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-net-au-net_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-tycoon-hack-no-donate_GM431946152.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_off000037e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37E9 23500 bytes
SHA-256: cf23feccbcac66178b1de3ee65f3e910189bcaa620a58c1f6ff3db4b827ac18a
font_01_sfnt_off00006d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D31 19276 bytes
SHA-256: c1a9850d185a71b5de9517f7bb60a0591a96ee8119b11d7f736b7b37d50d2cec

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