Malicious PDF — malware analysis report

Static analysis result for SHA-256 737c33db833faa6e…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 19:48:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 29a07cdc73f451e093e68642568f3071 SHA-1: 7e0801c77197de3e60d55e89a0046a1630a059d1 SHA-256: 737c33db833faa6ea87338632e78819df21ba10b7e89d4c58207e12b0b225308
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a "download button" lure, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The presence of multiple links to external sites, many of which are structured as SEO-optimized PDF documents, indicates a link farm designed to drive traffic to potentially malicious 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.tw/app/431946152/instantrobux-game-hack
    • http://muslib.unmus.ac.id/repository/coin-master-free-spin-link-today-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/giving-away-free-toy-codes-for-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-can-i-get-robux-free_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-coins-for-planet-master-game_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-coin-link-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/huskybuscom-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/spin-free-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-blogspot_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/cheats-coin-master-free_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-real-2021-no-human-verification_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-links-for-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/hack-coin-master-android-game_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-heaven-links-free-spins_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/minecraft-xbox-360-free_GM479516143.pdf
    • http://muslib.unmus.ac.id//repository/where-to-get-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-site_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e33.bin
ae65e426b93a5fe313e570a418391488fbd13a91a95c7f3f795ad28f70a9d140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E33 22092 bytes
font_01_sfnt_off00005f3b.bin
5a13a4ba7d4aa3ba564163d7fd1f4e40de414e0c8b16d10ac9018e4301010f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 18656 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.