Malicious PDF — malware analysis report

Static analysis result for SHA-256 1144cd937af99eff…

MALICIOUS

PDF

45.1 KB Created: 2021-05-12 03:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a6d919eb437a575380c12e4a7b3cd07f SHA-1: 6c17edca1a9acedff14f991e020c62f6c9bf1475 SHA-256: 1144cd937af99efff1c9f31cd84e666590d4a82a256e920681f51532753f762e
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-optimized slugs pointing to sites offering game hacks and free in-game currency. This indicates a link farm designed to lure users to potentially malicious or unwanted content. 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 https://netcdn.xyz/app/479516143/play-minecraft-free-online-no-download-game-hack
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-free-stuff_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/legit-coin-master-hack-without-verification_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/how-to-buy-robux-for-free_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/robux-fun-hack_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-make-free-robux_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/master-coin-master-free-spin_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/how-to-get-free-minecraft-windows-10_GM479516143.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-hack-android-2021_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-spins-and-coins-app_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-robux-easy-and-fast_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-hair-roblox-boy_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/minecraft-hacks-xbox-one_GM479516143.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-download-coin-master_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/e-free-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d0e.bin
bc8cc4e3d78b758ae08d33a9ade20d36aa4d7623cae84386f7d5fe0d739ee8c3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0E 28376 bytes
font_01_sfnt_off00008d13.bin
de5879bc26708eaa4e1c92eaf1e42bccba815f23883936bce9a95b33e109549e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D13 18624 bytes

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