Malicious PDF — malware analysis report

Static analysis result for SHA-256 70417e260a3867cb…

MALICIOUS

PDF

42.9 KB Created: 2021-05-15 06:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 58ea9139b6b0bb0e9774587e00814c5f SHA-1: 8b163e24589b6bd7c2bfa2ecd92ad32e6d6f1653 SHA-256: 70417e260a3867cb2783ef59b29512cd13b015f8b2f202365e1b22c319795d07
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many of which are structured as SEO-optimized PDF gateways, suggesting a link farm designed to distribute malicious content. The presence of a ML_NYX_PDF_MALICIOUS heuristic firing with a high confidence score further supports the malicious nature of this file. The document body, though partially garbled, contains references to game hacks and a URL, indicating a lure for users to download potentially harmful files.

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/406889139/coin-master-viking-quest-hack-game-hack PDF link annotation
    • http://maestriadental.com/images/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://maestriadental.com/images/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://maestriadental.com/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://maestriadental.com/images/free-robux-com-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_003_off00004a4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4E 25612 bytes
SHA-256: daa56227500f394eab182de7a6c70acb8e5b93d8f686cad583e43c911e3d53c0
font_01_sfnt_off00008484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8484 18436 bytes
SHA-256: cdd7d2044fff2b3d5d42961dfcf560b0c02369c6689bd16c26f5d034f53f0ba6

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