Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f5261ac9ec6de00…

MALICIOUS

PDF

46.4 KB Created: 2021-06-10 14:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3e0c2bd823c01ff375104abb092c79d4 SHA-1: 69ee87973fdfe6b250b674264c397f96ff9d2c55 SHA-256: 1f5261ac9ec6de00c30a86808184412db6fc8e1fc0ca50ea9ee9aee53687a987
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to various game-related download sites, suggesting a link farm or phishing lure. The presence of a download button heuristic further supports the malicious intent of directing users to external resources. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/comment-hacker-quelqu PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/seven-v2-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-the-crazy-elevator-free-toilet-dhlc_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/moonactive-coin-master-free-spins_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_off00005065.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5065 27568 bytes
SHA-256: 1c9e8c4a749c138b2a42f777d41a0bc80772201084f268d6e74be0b9e1d79f6d
font_01_sfnt_off00008fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA1 19368 bytes
SHA-256: 9344c9515a317e3ce8f812cd2ba6f5dd88a399d9faf3e4758d19579730655306

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