Malicious PDF — malware analysis report

Static analysis result for SHA-256 576e0f44c2d8d6da…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 23:12:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8fe010d015d9e710b761e1461097eb43 SHA-1: d0abfebc6350cae32628062a1ba71bb46cb2a34a SHA-256: 576e0f44c2d8d6daac1294ff64b6cebfba75774f2a3d1ccbd2dbefd68fbc702b
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are presented as 'free Robux' or game hack resources. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful content or downloads. The ML classifier also strongly flagged this PDF as malicious.

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/free-robux-automicattley-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/good-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/fight-club-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coins-on-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-robux-easy-no-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/epic-mining-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-realms-free_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
font_00_sfnt_off00003168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3168 22508 bytes
SHA-256: 2630aaaf81a7260aa02cfc75b0971ce8028d0dad9c3f325c1f40bb9da1dd7cd6
font_01_sfnt_off000063ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AC 19452 bytes
SHA-256: d819900b2a35e7a243d68f445c2bd48a2db9b27b50205cbbc263e56012796587

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