Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a887f36757a5ae…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 04:13:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a730701b7d20d293c6f7255821d20ac5 SHA-1: 09b2d4219a43dc818c7aa3cf93b146775cf6d8e1 SHA-256: 36a887f36757a5ae27b80dc3adc7ef874a0b8a7a460fac0d8451ab5e7a755835
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites promising free in-game currency and hacks. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious workflow designed 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/406889139/daily-free-spins-coin-master-heaven-game-hack
    • http://balitgetas.co.id/pustaka/repository/how-to-get-free-robux-card-codes-2021_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/free-card-link-coin-master_GM406889139.pdf
    • http://balitgetas.co.id/pustaka/repository/free-roblox-cards-no-human-verification_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/free-bobux_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/free-robux-for-kids_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/free-spins-from-coin-master_GM406889139.pdf
    • http://balitgetas.co.id/pustaka/repository/hack-coin-master-free_GM406889139.pdf
    • http://balitgetas.co.id/pustaka/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/minecraft-online-free-no-download_GM479516143.pdf
    • http://balitgetas.co.id/pustaka/repository/coin-master-daily-free-spins-blog_GM406889139.pdf
    • http://balitgetas.co.id/pustaka/repository/robux-generator-robux-hack_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/hack-prison-life-roblox-2021_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/give-me-free-robux_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/coin-master-heaven-free-spins-link_GM406889139.pdf
    • http://balitgetas.co.id/pustaka/repository/how-to-get-unlimited-robux-for-free-2021_GM431946152.pdf
    • http://balitgetas.co.id/pustaka/repository/real-hack-for-coin-master_GM406889139.pdf
    • http://balitgetas.co.id/pustaka/repository/how-to-get-a-hacker-off-your-roblox-account_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000314b.bin
1bf52cd648f050af80d762dc83975b53faacd87140aa19fa9fbaad6a5ca5a9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x314B 23424 bytes
font_01_sfnt_off00006651.bin
39b339376fdbe78781353a9ec81a33cf993053e24b3afcbe954f5295ad91a2a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6651 18712 bytes

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