Malicious PDF — malware analysis report

Static analysis result for SHA-256 f540d5b2b6f7a37b…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 06:55:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fdb36dfc7eb8effb506d5f0fd0d60933 SHA-1: 045d66da35bdf0069b2fc91ffb9c88b31f2759f3 SHA-256: f540d5b2b6f7a37bcbf05c3a588f5e0818a6a85a453ad707b2bfe28190f3842d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are presented as download opportunities for game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly suggests maliciousness. The document body itself contains references to 'Roblox Cheat List' and 'wkhtmltopdf', further supporting the lure of potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-cheat-list-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/top-best-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-33-hack-version-download_GM406889139.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
font_00_sfnt_off00002cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF4 22832 bytes
SHA-256: fa717606550543edfb9164c0e0a3e808e5ab8a1716c00ac50fa1234cd13d879b
font_01_sfnt_off00006064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6064 18876 bytes
SHA-256: b2e9234eb27a13968dbca388f3710594d133cade80519c80e8220a3c20a302b0

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