Malicious PDF — malware analysis report

Static analysis result for SHA-256 8febafc313e8c902…

MALICIOUS

PDF

50.3 KB Created: 2021-05-12 20:15:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 068ebe5b4e8b8056da28325ed99ef849 SHA-1: 7d9842a3c46e5c8faa2ca6033be10b438f8fd484 SHA-256: 8febafc313e8c9020d87171229d58c5dad269a51fd25df58281442a32fbdc3a9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, many of which are SEO-optimized PDFs related to game cheats and hacks, suggesting a link farm designed to attract users. One prominent URL points to a 'coin-master-hack-mod-apk-game-hack', indicating a lure for users seeking to download unauthorized software. The presence of a visual download button further supports the malicious intent of tricking users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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/coin-master-hack-mod-apk-game-hack
    • http://katalog.perpustakaanlia.net/repository/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/free-coin-master-spins-blog_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/free-robux-come_GM431946152.pdf
    • http://katalog.perpustakaanlia.net/repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/coin-master-free-spins-ios-2021_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/is-minecraft-dungeons-free_GM479516143.pdf
    • http://katalog.perpustakaanlia.net/repository/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/coin-master-email-free-spins_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/coin-master-server-hack_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
    • http://katalog.perpustakaanlia.net/repository/best-way-to-get-free-robux_GM431946152.pdf
    • http://katalog.perpustakaanlia.net/repository/rbxoffers-earn-free-robux_GM431946152.pdf
    • http://katalog.perpustakaanlia.net/repository/claim-gg-free-robux_GM431946152.pdf
    • http://katalog.perpustakaanlia.net/repository/free-2021-robux_GM431946152.pdf
    • http://katalog.perpustakaanlia.net/repository/free-robux-com-no-verification_GM431946152.pdf
    • http://katalog.perpustakaanlia.net/repository/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • http://katalog.perpustakaanlia.net/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • http://katalog.perpustakaanlia.net/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a98.bin
937b16757e0c2339ee5999f6503d334a87276910722f005e15fc1b720734d75b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A98 25820 bytes
font_01_sfnt_off000085ed.bin
0f52aca0a995886a182d1c74cce242daee0a80c7ab1f7ac0b1a8e49935ba230b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85ED 5696 bytes
font_02_sfnt_off0000989f.bin
6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x989F 2788 bytes
font_03_sfnt_off0000a28e.bin
8758dd50bc7648d35d2c531368c06e2fb0219f77b8251a32ffca1508c8a7ec2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA28E 18068 bytes

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