Malicious PDF — malware analysis report

Static analysis result for SHA-256 73415fb241b0238b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 12:45:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7c23702001045600828320c43fabc4a1 SHA-1: 6c935b7a6b2dfc9f4f372043506a8f6f24c48dab SHA-256: 73415fb241b0238bdbb35ce0567d7b168f9d3cccea2bc75a9a10c74928d6b257
102 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are related to game hacks and freebies, suggesting a lure for users. The 'PDF_SEO_LINK_FARM' heuristic indicates a mass of external links, and the ML classifier flagged the PDF as malicious. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-get-free-snacks-in-coin-master-game-hack
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-apk-link_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-pet-food-free_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/game-hunters-coin-master-free-spins_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-roblox-gift-codes-2021_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-tower-battles-credits-hack_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/free-gold-cards-in-coin-master_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/uncopylocked-free-robux_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-connection-lost-hack_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/rbx-com_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/hacks-for-gun-games-roblox_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/daily-spin_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/roblox-free-accounts-pastebin_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-cards-link-2021-today_GM406889139.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-get-free-robux-hack-without-human-verification_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319a.bin
b5cc38293518004cc8a1cff639f4f4359c1f9bfc6cd463e95f623a7bd314a7cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x319A 22508 bytes
font_01_sfnt_off00006348.bin
9bfaebadd1c63bbcf8fae185af5d645a9ecdb7ad968488e86b545ec7ef79ab2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 18332 bytes

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