Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63d9a8379ec20f9…

MALICIOUS

PDF

47.8 KB Created: 2021-05-19 07:18:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dfe28d1c16532eaa3eb6d0daf725f335 SHA-1: d5dbc851152e2ccd712a067979e04d9ad09336f2 SHA-256: c63d9a8379ec20f9fb92d55136ce34d3e83be4afb0ba7b51bd32210415bb579a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/blox.pink-free-robux-game-hack PDF link annotation
    • http://www.nfca.org.tw/upload/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C64 28332 bytes
SHA-256: 3b37c21aa0524dd7010228db6c16f9496722a5e894d713a9c7c9d74145a09852
font_01_sfnt_off00008daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAF 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off00009783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9783 18620 bytes
SHA-256: 20ad8a2126bb9f489cd4862944fdd8c1c01869fd803457c3ce1390bedb89f69f

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