Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef14e4030eff891…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 22:59:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 71c8dba4d9e17e1a5df3b18a7171df0a SHA-1: 6117406895ae760e36d55449580d06bc7cdc7fb9 SHA-256: 0ef14e4030eff8919b7f2b6c8eaeee6a18f04f6db5b20dd8b16bc70eaeaf82ab
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and a document body that promises free Robux and game hacks, indicating a phishing or scam attempt. The heuristic PDF_SEO_LINK_FARM suggests a large number of external links were generated, likely to distribute malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent to redirect users to potentially harmful 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/431946152/how-to-get-free-robux-without-using-money-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-without-downloading-app_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pseint-exist-hack-roblox-lvl-6_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-2021-april_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-adidas-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/daily-free-spins-coin-master-app_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
font_00_sfnt_off00002fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDB 22456 bytes
SHA-256: a2472be29df6da81961cb200cd83febe1a77d57fafaff801c5d94f81ce28d0fd
font_01_sfnt_off000061f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 19844 bytes
SHA-256: 8d66b4997dd410b409c2cf99fe424702520d2acb79941ea7c0b04d0168f3cc81

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