Malicious PDF — malware analysis report

Static analysis result for SHA-256 136d53cf6b21e117…

MALICIOUS

PDF

36.7 KB Created: 2021-06-28 08:06:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c6979465045011a241db8933db6a7282 SHA-1: 6b7fbb7f5146654a69332fe86a73b48aa0376894 SHA-256: 136d53cf6b21e117d4c1891ee6050e069b29224908b1a2b5609acb268c3feb44
82 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 disguised as game-related downloads or hacks. The presence of a "Password-protected archive handoff" heuristic suggests that the document is intended to trick the user into downloading an archive which may contain a malicious payload, protected by a password provided within the document itself. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-hack-your-friends-roblox-account-2021-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id//repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-robux-easy-december-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-code-for-roblox-december-2021-unicorn_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hacked-by-roblox-i_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/piano-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-a-free-robux-card_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/link-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-gui-hack-mac_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-cheat-level-200_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/does-roblox-ever-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-dominus-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/black-panther-mask-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-waiting-pastebin_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000035c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C4 22424 bytes
SHA-256: fb4d0b08d948f12e9c4b6768a010b6470b87e6dfa6966ad2b0bfd233dd8d489c
font_01_sfnt_off00006760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6760 20088 bytes
SHA-256: 4689866ffac8461b7e13013740ab5ea006454842a45e01c5776ad42efffd081c

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