Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4801f82c45bad0c…

MALICIOUS

PDF

36.7 KB Created: 2020-06-06 19:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b06d9d6d43669d8d753bde2bfd9e44e1 SHA-1: 331fc44083db766ad8b1e1d8bf6d5ce359a201ea SHA-256: b4801f82c45bad0c2f0a38aa4fba96a082fc6ff41446dba241084b7d96dfb057
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, identified as a PDF link farm. The document body, though heavily obfuscated, contains references to URLs that are part of this link farm. The primary purpose appears to be directing users to a network of sites, likely for malicious redirection or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://hoangtugio.org/uploads/1/3/0/6/130621954/130621954.html#palme+organik+kimya+soru+bankas%25C4%25B1+pdf
    • http://millennialinside.com/uploads/1/3/1/4/131406356/8192532.pdf
    • http://lostcaribou.com/uploads/1/3/0/2/130289618/7039810.pdf
    • http://twistedbelly.com/uploads/1/3/0/2/130270900/fe17463b3b92.pdf
    • http://awdogphotography.com/uploads/1/3/1/4/131482828/180b563067cfb4.pdf
    • http://hoangtugio.org/uploads/1/3/0/6/130621954/terms.html
    • http://hoangtugio.org/uploads/1/3/0/6/130621954/dmca.html
    • http://hoangtugio.org/uploads/1/3/0/6/130621954/policy.html
    • https://gizopivij.files.wordpress.com/2020/06/77803161194.pdf
    • https://gudelofozopu.files.wordpress.com/2020/06/80437495110.pdf
    • https://dufaxuxed.files.wordpress.com/2020/06/13107572959.pdf
    • https://nufiluva.files.wordpress.com/2020/06/zujejiferejobo.pdf
    • https://bewenaxo.files.wordpress.com/2020/06/92692054808.pdf
    • https://nugejelibu.files.wordpress.com/2020/06/fuxog.pdf
    • https://ronewodovuk.files.wordpress.com/2020/06/bogofilinomiganiz.pdf
    • https://losanelo.files.wordpress.com/2020/06/gobawuragabemu.pdf
    • https://xavodurumumo.files.wordpress.com/2020/06/nukulatotanawu.pdf
    • https://gamanonazap.files.wordpress.com/2020/06/89458591301.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d24.bin
31beefa3ee2378bec383c89952c6bf6c458826b57327bfb19864f7237986bc1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D24 13112 bytes

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