Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f73c70f59465195…

MALICIOUS

PDF

37.3 KB Created: 2021-07-04 01:14:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 356b2c384950f6d3b503ebe3aef68861 SHA-1: d9837e5724189c5489b2df7320470df3f9d74ca9 SHA-256: 0f73c70f59465195facd1a096f2e4154c7299da56ffbc61645af60d98f752b4f
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to resources related to game hacks and free currency. The primary URL http://netcdn.tw/app/406889139/coin-master-hacks-2021-game-hack suggests a lure for users seeking cheats for the game Coin Master. The ML classifier and the PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent, likely to direct users to a malicious download or exploit site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/coin-master-hacks-2021-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/free-robux-no-scam-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-movement-tool-roblox-hotkey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/can-you-get-roblox-on-ps4-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-com-login-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-dragon-ball-z-final-stand-hack-script_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cbx4-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-i-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/giveaway-free-robux-live_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-promo-codes-2021-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-robux-no-human-verification_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
font_00_sfnt_off00003060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3060 23032 bytes
SHA-256: 786001ddc3d56967715ba8802c0d6f83d8648e37e5abba1b0dea840d1495e5fa
font_01_sfnt_off00006465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6465 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 18408 bytes
SHA-256: 8438728008f6ab05b5c9a65d4eeb1f2e5c23a436eadc11c6e76328f72b7d7fb7

Open this report in the interactive analyzer, or submit your own file for analysis.