Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4aa40ba18971ffa…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 23:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8a77a6d278be3008937588fa3318f4ae SHA-1: 2977fc29a9b7a4328d2b89c6b6ee730eb20e3c4e SHA-256: f4aa40ba18971ffa2d3e67a26a6680431bb82748fb52bc1f09c77ea073a9e1d1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to sites offering game hacks and cheats for popular mobile games like Coin Master and Roblox. The document's content and the numerous external links strongly suggest a phishing or scam attempt designed to drive traffic to potentially malicious or ad-filled websites. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/coin-master-links-that-don-t-expire-game-hack
    • http://library.yamasi.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/roblox-report-hacker_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/coin-master-lucky-patcher-hack_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/roblox-cute-girl-outfits-free_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/coin-master-hack-tool-for-pc_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/irobux-com-redeem_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/how-to-hack-roblox-games-on-pc_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/roblox-speed-hack-2021_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/can-you-get-robux-for-free_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/roblox-hack-downland_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/minecraft-building-hacks_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/free-robux-survey-only_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/hack-roblox-phantom-force_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/free-roblox-decal-pictures_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/roblox-hack-android-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f5d.bin
a63b2603169a7c5a532293a4546c2e1e5ccf0541e974ac978d50243ca910b511		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F5D 22700 bytes
font_01_sfnt_off00006225.bin
0bc74d52f75a1104db5e4695d05e5addd24de774456fb5db8c3829ae8d2508b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 18724 bytes

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