Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e56a70f9ec081c…

MALICIOUS

PDF

47.4 KB Created: 2021-05-13 16:02:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b7fb4001390f07efdb29a0359907d5a0 SHA-1: f0c8703630f40cf83cf39562ab8c417066ffd13b SHA-256: e9e56a70f9ec081cbca059a9bd505ffb6a9b6825c6c751afb45a19422a68f0d2
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm', suggesting a tactic to manipulate search engine results or direct users to potentially malicious content. The document body, though partially corrupted, contains a URL related to 'free spins for coin master', indicating a lure for a game-related scam. The presence of multiple external URIs and a high ML classifier score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/how-to-get-free-spins-for-coin-master-game-hack PDF link annotation
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.kabadixpress.com/uploaded_files/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.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_003_off00004e09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E09 28188 bytes
SHA-256: 0385c1c63c4d16048f7b587ee9eecf2e80710ee19e647045dc5688f20ca797c4
font_01_sfnt_off00008e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E33 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000097d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D3 18052 bytes
SHA-256: 3cfae0e628493b06a11893ba870a091d0c1d4835c1ebffdd70b8f2a1c7d637a9

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