Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3b969cdf6b25ce…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 04:38:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aa438a655a7957c08e527abd8b12f582 SHA-1: e50a139a29f1a732987e501ceea7d7a1f63ebbe6 SHA-256: 0a3b969cdf6b25ce53bc5058f3a1f696d0c258db97746ee529155c2ea19dd29b
102 Risk Score

Malware Insights

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

The PDF document contains a high number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to lure users. The presence of a download button and the ML classifier's high confidence score indicate a malicious intent to distribute further payloads or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-server-hack-game-hack
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-roblox-hair-girl_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-invite-friends-hack_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/daily-coin-master-free-spins_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-robux-place_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-hack-to-get-robux_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/hack-coin-master-for-free_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/minecraft-hacks-pc_GM479516143.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/minecraft-free-exe_GM479516143.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-spin-game_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-robux-without-verify_GM431946152.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-coin-coin-master_GM406889139.pdf
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004980.bin
8eff57426c616a2b3faf38d0b53900965529f00927a8ad0ff4d2f7b131c0f16e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4980 24756 bytes
font_01_sfnt_off000081b1.bin
688230296476030d30dfc283add0772308e9a9ed29622b3a8bac5aca69213cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B1 17828 bytes

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