Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cb7a64bccf38d7…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 13:44:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e5b4a17a28202470cc2ca7ab40eec6b9 SHA-1: 37753c013c8ad7c9878f3e6fc240b218b8c884cc SHA-256: 39cb7a64bccf38d76aa69ad1f1b61e33cb9b64808177fe943ecd27670cda6899
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, specifically a "link farm" designed to drive traffic to exploit sites. The document body and embedded URLs promote "Coin Master Free Spins" and related game hacks, aiming to trick users into clicking malicious links. The presence of numerous external PDF links, many with SEO-optimized titles, strongly suggests an attempt to manipulate search engine results and attract unsuspecting users. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/coin-master-free-spins-ios-2021-game-hack PDF link annotation
    • https://www.repository.ptiq.ac.id/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-robux-on-roblox-2021_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
stream_004_off00005287.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5287 24860 bytes
SHA-256: d965c48ac68c5e15d13d1053024d47ff3d9e8bc06028336f9ea53307b3a7e510
font_01_sfnt_off00008c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0E 18288 bytes
SHA-256: 2b6efa5e62152ff8c49d64075f52aeeb5d732445f14fabab56fec2f8f3dafea1

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