Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf905e0ea6e62d6…

MALICIOUS

PDF

57.1 KB Created: 2020-04-07 08:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bbe175e531f92826c1c2d2f9051622a4 SHA-1: 4f9977b97786271a78f5ce9c595ea903f76c0aba SHA-256: 8bf905e0ea6e62d6f4f7f4820d5ba84144f2931eb4e30f8547eb581ec9a5aa48
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links to various domains, a technique commonly used for SEO link farming or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The primary attack pattern involves leveraging these numerous external links to potentially distribute further malware or engage in phishing activities. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 3

  • 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.
  • 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://bossbeautiesofficial.com/uploads/1/3/0/6/130620712/130620712.html#bush+and+lane+baby+grand+piano+price
    • http://zionelite.com/uploads/1/3/0/6/130620667/patixodutafukor-berenosufuw.pdf
    • http://fodicamergator23.com/uploads/1/3/1/3/131398449/zaziwenawapu.pdf
    • http://sundaymorningbakehouse.com/uploads/1/3/0/6/130605002/5625094.pdf
    • http://dctothesea.com/uploads/1/3/1/4/131407440/fejuxanalumejuxideme.pdf
    • http://dexterdgibson.com/uploads/1/3/1/3/131380606/dizexu-ritagojezur.pdf
    • http://tractortraylordispatch.com/uploads/1/3/0/6/130604470/pudiwewexofit.pdf
    • http://themakeupniche.com/uploads/1/3/0/8/130813992/wulinupaboni_fomuveropujogo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a970.bin
816d933444035081cf6a6a46c82ec333400aa2f9037f25a87b30628ebdd60522		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA970 9844 bytes
font_01_sfnt_off0000ce24.bin
3bbda7b3b17b1987a96512e13a0a8feab57a28707129b34af62db9440b3e9efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 2648 bytes

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