Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d3510c8f67a315…

MALICIOUS

PDF

46.7 KB Created: 2021-05-20 00:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 47b3750a1a01d5bf480275db291775d5 SHA-1: d3e43dc05849770562472964be6e46decce5aa12 SHA-256: b3d3510c8f67a3155d3d49fa7681361df6da065d04d49c4a3045e4af4100db30
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are related to popular games and 'free currency' lures. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links suggests a link farm designed to drive traffic to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the embedding of links that likely lead to phishing or malware download pages.

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/free-spins-coins-coin-master-game-hack
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-village-cost_GM406889139.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-things-on-roblox_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/robuxy-com-free-robux_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-admin-roblox_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/minecraft-free-ios-2021_GM479516143.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-villages_GM406889139.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/roblox-robux-hack-generator_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/wahoogaming-co-free-robux_GM431946152.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-attack-hack-apk_GM406889139.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/coin-master-free-rewards-link_GM406889139.pdf
    • http://elearning.min3madiun.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-code_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049f8.bin
a650643ebc4de9d2227facfb2e2e526ffbc0b741b099ed6ac70bdae393b0cb0f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49F8 27832 bytes
font_01_sfnt_off00008a55.bin
9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A55 3124 bytes
font_02_sfnt_off00009533.bin
18816d8d761583b578c9833b8849e2eeaed27ef2f16a893d2032c58e3f8148b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9533 17884 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.