Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b9bb53000ca58c…

MALICIOUS

PDF

43.4 KB Created: 2021-05-17 10:34:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4219ccc17969b07f45d4b6ec556e891c SHA-1: d9352d5f127ba699393ae071fe40bd651ced336b SHA-256: e3b9bb53000ca58c2b9a09858218f1c3b54156c213d14f464f6ab761df365de1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are structured as SEO link farms. These links predominantly lead to pages offering free in-game currency or game hacks for popular titles like Coin Master and Roblox. The primary intent appears to be a scam or phishing operation, directing users to potentially malicious sites. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/can-u-get-free-robux-game-hack
    • http://seniornetwanganui.org.nz/images/coinmaster-rewards_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/minecraft-java-edition-key-free_GM479516143.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/free-spins-for-coin-master-hack_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-spins-coin-master-links-twitter_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/hack-coin-master-apk-32_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/how-do-you-download-minecraft-for-free_GM479516143.pdf
    • http://seniornetwanganui.org.nz/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-gen_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-free-redeem-code_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/robux-com-free-robux_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/original-roblox_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-hack-version-download-2021-ios_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/free-robux-with-no-verification_GM431946152.pdf
    • http://seniornetwanganui.org.nz/images/coin-master-hack-injection_GM406889139.pdf
    • http://seniornetwanganui.org.nz/images/hack-coin-master-without-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba0.bin
6538e305751bdcdc95e4f88b405cda8c9364fe71e7578fe0b16f0499e38a7842		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA0 25428 bytes
font_01_sfnt_off000086bc.bin
35bb0f01f69d1b5e790ed5f4c0eeb98998139975dc1eb58b588dc01b9002bbc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BC 18532 bytes

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