Malicious PDF — malware analysis report

Static analysis result for SHA-256 3015f0bb1c7dca5d…

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 04:02:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6ea1cd086847db88af2b7168e0be9a1a SHA-1: 109af068c82406a2e43014bab1bec2f62ae37248 SHA-256: 3015f0bb1c7dca5d98ae0a9a7acaa0e513084bfaa79410cfcc86075a2bc009f2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external PDF files, identified by the PDF_SEO_LINK_FARM heuristic. The document body and extracted URLs suggest a theme of game hacking and free in-game currency, likely a lure to attract users to click on these links. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to potentially malicious or spam-filled content hosted on external domains.

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/how-to-hack-minecraft-pe-game-hack PDF link annotation
    • http://esm-royet.de/images/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/games-for-robux_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://esm-royet.de/images/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://esm-royet.de/images/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/how-to-get-more-robux_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
font_00_sfnt_off00004c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C6E 24912 bytes
SHA-256: 30e6d1dba5b521edb45e7d283a3ff7d787427b36612aee8cd1aae1dd37463711
font_01_sfnt_off00008538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8538 18196 bytes
SHA-256: d34ad1dbd9dd4a0600043f837e3a6c6fdafb13b781254d1b565cb7d4b46c75dd

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