Malicious PDF — malware analysis report

Static analysis result for SHA-256 801ca83b7a111fda…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 14:33:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 67955836148c897cf3401549a535a6d9 SHA-1: d0b76714c2bd60315c4da49211bccea998fe961c SHA-256: 801ca83b7a111fda2903b1a6040da4da81a1847c446225e6d7b04b2196b51175
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 SEO-optimized and point to game-related hacks and free currency. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially malicious sites. The document body, though partially corrupted, contains references to 'free coin master gift link' and 'hack', reinforcing the lure.

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-gift-link-game-hack
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-roblox-gift-card-codes-2021_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/roblox-www-com_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-mod-download_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-ios_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/rewards-roblox-com_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-robux-pastebin_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/get-robux-com_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/roblox-hack-download-pc_GM431946152.pdf
    • https://elearning-min4jakarta.sch.id/__statics/gudangsoal/files/haktuts-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cbc.bin
99d3abe978c1867eee0f3b776dc760a9eefd589eb3ea6a5f1d1870d7ae647f09		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CBC 23924 bytes
font_01_sfnt_off00008312.bin
1ab37f68d76bb6673fe7e3ee425fbe9bd5389a518523b888c567f62bdf1aff93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8312 17880 bytes

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