Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1661767bc08bad…

MALICIOUS

PDF

45.2 KB Created: 2021-06-04 03:23:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 88d2d1af07b8093fed3d0c947f05debd SHA-1: 3863783d5592d03b57421f3b486e93957270d28f SHA-256: ae1661767bc08bad24f6793662465d75e2ca934a6d6c7a971518068343cce335
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are SEO-optimized to appear as legitimate resources for game cheats and hacks. The primary URL, 'https://netcdn.online/app/406889139/coin-master-hack-tips-game-hack', suggests a lure for users seeking to cheat in the game Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, pointing towards a malicious campaign designed to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/406889139/coin-master-hack-tips-game-hack PDF link annotation
    • http://pustaka.fti.unand.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/pokemon-go-free-kanto-tour_GM1094591345.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/pokemon-go-free-apk-download_GM1094591345.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/minecraft-116-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
stream_004_off00004f91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F91 29212 bytes
SHA-256: 3e9f80ba945216266a151e7888951e73b878840493551d2fc01dbb024577f1d1
font_01_sfnt_off00008f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6D 17892 bytes
SHA-256: 1fa242315f10f3fa2c9711447fa9857a94e1f1f203c41df7b4d39f1f5d94ad78

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