Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65f6c8473493609…

MALICIOUS

PDF

46.6 KB Created: 2021-05-12 00:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 074e59f60e250acc1491aa3a202e0cbf SHA-1: 095f5db1246e61074e7477f22d9a5c029a4586f2 SHA-256: e65f6c84734936091130c61024c04e79c6d2444f18b8b0feb6444e0aebc16f21
102 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which appear to be part of an SEO link farm designed to drive traffic to specific pages, such as 'coin-master-hack-spins-apk-game-hack'. The presence of a 'download button' heuristic further suggests a deceptive user interaction. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-hack-spins-apk-game-hack
    • https://itv-grabungen.de/images/coin-master-hack-without-verification-ios_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-free-link_GM406889139.pdf
    • https://itv-grabungen.de/images/minecraft-pocket-edition-free-download_GM479516143.pdf
    • https://itv-grabungen.de/images/free-shields-coin-master_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-tiradas-gratis-2021_GM406889139.pdf
    • https://itv-grabungen.de/images/free-roblox-gift-card-codes-2021_GM431946152.pdf
    • https://itv-grabungen.de/images/avatar-the-last-airbender-roblox_GM431946152.pdf
    • https://itv-grabungen.de/images/blogspot-coin-master-free-spins_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-hacks-xyz_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-spin-hack-without-verification_GM406889139.pdf
    • https://itv-grabungen.de/images/coinmaster-spins_GM406889139.pdf
    • https://itv-grabungen.de/images/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • https://itv-grabungen.de/images/minecraft-world-free-download_GM479516143.pdf
    • https://itv-grabungen.de/images/coin-master-free-gift-links-2021_GM406889139.pdf
    • https://itv-grabungen.de/images/free-robux-without-human-verification-real_GM431946152.pdf
    • https://itv-grabungen.de/images/roblox-premium-free_GM431946152.pdf
    • https://itv-grabungen.de/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • https://itv-grabungen.de/images/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdf
    • https://itv-grabungen.de/images/free-game-packs-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e0.bin
60b0ec83f3bf87875d0745bdb347e5185d78a15985247a6d61d521847acd7913
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E0 25020 bytes
font_01_sfnt_off000082a6.bin
d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82A6 7332 bytes
font_02_sfnt_off000094be.bin
116ba2d485dba3cc3c3f0b67c538e954af0badc3125826b285df3e1af5dac94f
pdf-font-stream PDF embedded font (sfnt) at offset 0x94BE 17892 bytes