Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ffa40dfc7b0119…

MALICIOUS

PDF

47.5 KB Created: 2021-06-03 07:53:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fd740b2ce6d6c43d370a40ff7ec48f89 SHA-1: 59bb7632de856855423585d66d972cc06a83fef6 SHA-256: c2ffa40dfc7b011925fc0ae0d81ae41ef25b1bb60837da71d53e4dcecbe5d1a3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are SEO-optimized to appear as legitimate download pages for games like Coin Master and Roblox. The primary URL, https://netcdn.online/app/406889139/coin-master-mod-free-download-game-hack, suggests a lure for game modification tools, which are often associated with malware distribution. The heuristic findings indicate a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-mod-free-download-game-hack PDF link annotation
    • http://library.yamasi.ac.id//repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-code-fandom_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/tiktok-free-code_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/mathep_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000549d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x549D 24924 bytes
SHA-256: 9b099fc62613e904fddf927b8e072754450a0e0002a4f3fa361b63d1d585b80e
font_01_sfnt_off00008cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDE 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000096c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 18292 bytes
SHA-256: df3d00f786f79046a7b02f352eafccbddd11185eddbe203132848a1a76bb74a4

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