Malicious PDF — malware analysis report

Static analysis result for SHA-256 886fad0bfada5a28…

MALICIOUS

PDF

42.5 KB Created: 2021-06-04 01:23:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 07e717f3277b5346600c36456f7857cc SHA-1: 8bf467dab1a2471608180ffe299dc0fc375dd674 SHA-256: 886fad0bfada5a2869a142f0a3aa7bad95b28d84c219056468c54183f83e7b20
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 related to game hacks and free in-game currency. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a deceptive lure. The primary URL, https://netcdn.online/app/406889139/free-coin-master-stuff-game-hack, likely serves as the initial landing page for a malicious download or redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/free-coin-master-stuff-game-hack PDF link annotation
    • https://library.stikesmi.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004df6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF6 24048 bytes
SHA-256: 59f8a898214b99e0e3054d8f65901ccf68132ac274c7136255027816b442457d
font_01_sfnt_off000084c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C7 17848 bytes
SHA-256: 4433ab11b9786de2c085a569790164fdba01b80ea586efee10f18c7ad04333c8

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