Malicious PDF — malware analysis report

Static analysis result for SHA-256 1887c7453caf98b5…

MALICIOUS

PDF

42.0 KB Created: 2021-05-19 04:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ff95ebb0842d004203ef673bd65e50d5 SHA-1: 0b8bf88b657aa1e4ebbaad2474d3b80f47247aac SHA-256: 1887c7453caf98b50f93b3ed9c6d9f0c1eb59ebbb6798852e3da8d1687326708
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that link to external resources, many of which are presented as PDF files themselves, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains references to game-related content and URLs, aligning with the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristic findings. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is designed to lead users to malicious content.

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/479516143/free-minecraft-videos-game-hack PDF link annotation
    • http://reisebild.eu/images/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/free-roblox-characters_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
stream_003_off000048ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CA 25044 bytes
SHA-256: d200ac54a7cf92c4ff5ee5d4c0698350dd162ac01684a22b38ed7b232ed4d3f9
font_01_sfnt_off0000827f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 18020 bytes
SHA-256: 6cfe610ecbcacf9195189a6c1e3d6544445db69855dd5d4e392c322ec4193c6d

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