Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8373fc3fca798f6…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 06:47:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f24454b580abed625c0b1d170b82939a SHA-1: eaae0a8c37783e5d4d8b9da72022595bb36f18e6 SHA-256: e8373fc3fca798f62a6a89ec6cc961bdec51bf5b9a49463934b53cc8319ec024
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of embedded links, many of which are SEO-optimized and point to external PDF files hosted on potentially malicious domains. The document body and extracted URLs suggest a lure for "free spins" or "free robux", indicating a phishing or scamming attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/coin-master-free-spins-link-2021-game-hack PDF link annotation
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/www-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-home_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BB 28408 bytes
SHA-256: cf69ffc419c81c914151662fbfa637ff0bab16bf9931001d62944f4035972603
font_01_sfnt_off000092ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CA 2920 bytes
SHA-256: 20adec2d11e2528e2f7a752cd3836e028276acd22c906d4bc6e573fd37644330
font_02_sfnt_off00009ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE6 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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