Malicious PDF — malware analysis report

Static analysis result for SHA-256 019187c1c37dca78…

MALICIOUS

PDF

50.5 KB Created: 2021-06-04 01:52:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 95c3c9d51fec32304a2303da006a5ff7 SHA-1: 0cd33369b8b451f079cdd534c2d4eb21a59a8fd9 SHA-256: 019187c1c37dca7899b29db676e4b5a033cd310346ff3ec688d95e44db759d24
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to websites offering game-related rewards, suggesting a phishing or scam campaign. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URIs and the overall structure indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9681

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/get-free-spins-for-coin-master-game-hack
    • http://perpustakaan.pa-jember.go.id/repository/coin-free-spin_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spins-app_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/cheats-coin-master-free_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdf
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdf
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-spins-iphone_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/daily-free-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/free-coin-master-app_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-no-apps_GM431946152.pdf
    • http://perpustakaan.pa-jember.go.id/repository/cheat-codes-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/bux-life-free-robux_GM431946152.pdf
    • http://perpustakaan.pa-jember.go.id/repository/pokemon-go-free-promo-codes-2021_GM1094591345.pdf
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-giveaway-live_GM431946152.pdf
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-free-coins-link-march-2021_GM406889139.pdf
    • http://perpustakaan.pa-jember.go.id/repository/gold-cards-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050c8.bin
3cc13c0b2dcbff5201090a320f2f6764f0b1607d123041a818ea7bd73a6aa76b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C8 25500 bytes
font_01_sfnt_off00008b39.bin
82b9aac8f27b2fdaa3cb9f868c94ad41dff729708008f76f58d8dc4056652d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 4192 bytes
font_02_sfnt_off00009996.bin
6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9996 2788 bytes
font_03_sfnt_off0000a386.bin
9bf67b2ee87cdcf37b0aaa2d40e70a5836dac1840b9be614bff5a3f1a0edfaa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA386 17884 bytes

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