Malicious PDF — malware analysis report

Static analysis result for SHA-256 84db59c7e4c02741…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 18:32:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f367f4170770c640638416a3a852cc7e SHA-1: d8382238c3559c3f7d3d313516fd7d6e6f5330ed SHA-256: 84db59c7e4c02741d3dd385ed3c58746ca403c24c3aa0ce4867b0378811b0f78
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and point to pages offering hacks or free in-game currency, suggesting a lure for potentially unwanted or malicious downloads. The presence of a 'download button' heuristic further supports this, indicating a deceptive user interface. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-hack-mod-apk-unlimited-spins-game-hack PDF link annotation
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.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_off00004b2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2B 25688 bytes
SHA-256: 267955a56583203f533258d2314be6c92931558d15b893be500b18b96e173c51
font_01_sfnt_off000085b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B6 18584 bytes
SHA-256: 18de0d3395175a01182e22f6397e1dac7410efb25a7e1b1cdc961642bba379c4

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