Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e181919fed8458…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 12:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c856bff1b4871256d30f6cf770dd14cb SHA-1: 10949a5182e0e57b05d6353b4ff85749b7c65460 SHA-256: e9e181919fed8458fecd7c56d2788dbee1ff08eb792c78060486cb0656e72e1c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related content, suggesting a link farm designed to attract users. The presence of a direct download URL and the overall structure indicate an attempt to redirect users to potentially malicious content or downloads. While no scripts were explicitly extracted, the PDF's nature and the heuristic firings strongly suggest a malicious intent to lure users through deceptive links.

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/free-coin-master-game-game-hack PDF link annotation
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://xn--80aeb7bbceeegc.xn--p1ai/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B14 24928 bytes
SHA-256: e9e48b688cc9bf6b35f89f60bdfdaa816cfd3d73eca17a1546c8b5f6cb4bbcab
font_01_sfnt_off00008391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8391 17968 bytes
SHA-256: 26c9c4b875abe90d5a203e632a25aafef6162dffda8186c61deacbdf7b71a521

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