Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a1165f325213a3…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 06:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 879e61b88a7875757fefd83c77f9997a SHA-1: 18935bc249460ce2c63e446c4c04ba4110efd1a8 SHA-256: 40a1165f325213a381f0a06c366f6f20de3f885bc415d22371e788a419132223
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 0.9971

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/how-to-hack-someone PDF link annotation
    • http://floreswindows.com/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://floreswindows.com/images/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://floreswindows.com/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://floreswindows.com/images/robux-generator_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4906 24424 bytes
SHA-256: 0b6cc5e5e6192a9397544a9098e193893d00bb42b5e56881d219af4d8cc72247
font_01_sfnt_off0000804f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804F 19316 bytes
SHA-256: 0830f2bc2b032c7ad37be74462a8461862374830fa053aba1852b18e492c5f08

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