Malicious PDF — malware analysis report

Static analysis result for SHA-256 681305e1cf3ae924…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 10:08:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e18019eb92b5b24915cfc106f9f92383 SHA-1: 1abaa875de99d11322891797221ae24303e484e3 SHA-256: 681305e1cf3ae92437495cc9d94cc25f14723c1a6594974b280bcbe709b4231a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which are SEO-optimized to appear as legitimate resources for popular games and in-game currency. The primary URL, http://netcdn.tw/app/479516143/minecraft-java-edition-free-trial-game-hack, suggests a lure for free game trials or hacks. The heuristic PDF_SEO_LINK_FARM indicates a large number of similar links, pointing towards a link farm or scam operation. No scripts were extracted, but the overall structure and content strongly suggest a phishing or malware distribution attempt.

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.tw/app/479516143/minecraft-java-edition-free-trial-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-on-roblox-with-proof_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/animation-editor-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pokemon-go-free-friend-codes_GM1094591345.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-hack-2021-no-download_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_off00003273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3273 22540 bytes
SHA-256: a94795bbf67445b8e4d0d0fb6cfe39c8544a2fd1edee095eacb690a617ca83bc
font_01_sfnt_off00006490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6490 18524 bytes
SHA-256: d4a994fd7502902f1ccb0c5c51989318f5cd97a3a708631542142bcef13529e5

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