Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c75f86244d355c…

MALICIOUS

PDF

43.0 KB Created: 2021-06-04 03:01:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6fb30ba8af7a0f8b25a521e0f61387f6 SHA-1: 8f2a6c432b0b176e8cb170c11b0b00dc9d92ed2f SHA-256: 30c75f86244d355c700b57d6f9181f81f267ff7e018b6d3112df6b1b120741f8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are related to game hacks and free items, suggesting a lure for users. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous embedded URIs and the PDF_SEO_LINK_FARM heuristic indicate a high likelihood of the document being used to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/how-to-hack-coin-master-apple-game-hack
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/daily-spin_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/coinmaster-fan-page_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-to-play-minecraft-servers_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-free-spins-glitch_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-coin-master-hacks-no-verification_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/20-free-spin-link-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/roblox-gift-card-for-free_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-robux-websites-2021_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/minecraft-hacker-mask_GM479516143.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/how-to-get-free-food-on-coin-master_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/a-lot-of-robux_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-coins-coin-master-spins_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-coin-master-app_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id/repository/roblox-jailbreak-hack-download_GM431946152.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-spins-coin-master-ios-2021_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/free-coin-master-spin-app_GM406889139.pdf
    • http://grhasurya-pustaka.smkmuh2wates.sch.id//repository/robux-generator-without-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fac.bin
e0cab11a55b120cd25594af36da26120f6d21d77b8cc70cfc947132249284a86		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FAC 23868 bytes
font_01_sfnt_off000085cb.bin
b6a735d9e3f53415aa491e3485cc1cfcf2c3f420c3f64ca45b3fcf2c99820254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85CB 18128 bytes

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