Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc85c87d5bbebb32…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 05:53:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 622764cad7c81051a9f83af114c6c709 SHA-1: 0985c14780243b98c0306c7e9200273c4719e8e1 SHA-256: fc85c87d5bbebb328f3f8a0322aec9641c45c42ee8fd6ec9c0b715a453363e96
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes game-related cheats and currency, strongly suggesting a phishing or scam attempt. The ML classifier and PDF link farm heuristics indicate malicious intent. The embedded links likely lead to malicious websites designed to exploit user interest in free in-game items.

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/431946152/how-to-hack-someone-on-roblox-game-hack PDF link annotation
    • http://www.hlad.hr/files/free-game-for-roblox-studo_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/como-ganar-robux-facil-sin-hack_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-gears-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-hack-roblox-with-its-source_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-without-human-verification_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_off00002f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F83 22004 bytes
SHA-256: 22c426630a9ada7556794c7f595ccec42e3d56d350c643cd3f977f3b59b839ed
font_01_sfnt_off00005f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 19080 bytes
SHA-256: 963276ac3658a4f1303280410bd3aafd1a833c38ea79ed0af769875644ea58f7

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