Malicious PDF — malware analysis report

Static analysis result for SHA-256 029aad6cbf3428b8…

MALICIOUS

PDF

34.4 KB Created: 2020-06-15 16:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98d3cc976e7248bbd9422eaaec4e9e7a SHA-1: 34679e47b8e5002d18aa106758d29359be275664 SHA-256: 029aad6cbf3428b8583c9903a5c729cce5e665c03ab85f6c5f8b06021deef306
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, suggesting a coordinated effort to distribute content or manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a precise user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://labelle-qatar.com/uploads/1/3/0/8/130813840/130813840.html#gendex+770+user+manual
    • http://goto-market.com/uploads/1/3/0/6/130605335/vijezij.pdf
    • http://tinyplanettours.com/uploads/1/3/0/6/130603851/4941080.pdf
    • http://chrislockett.com/uploads/1/3/0/9/130969421/kosedorapofokul.pdf
    • http://getitrevamped.com/uploads/1/3/1/8/131859261/netadifojigozowem.pdf
    • http://roushredesign.com/uploads/1/3/0/5/130588841/51f0a.pdf
    • http://aureliakbrown.com/uploads/1/3/0/2/130287923/7584415.pdf
    • http://pixelobet.com/uploads/1/3/0/5/130551625/8249250.pdf
    • http://mail.yourimmobile.de/uploads/1/3/0/6/130639546/pujovabezu.pdf
    • http://desireeguzmantherapy.com/uploads/1/3/1/0/131070904/rimozine.pdf
    • http://walnutmarket-newton.com/uploads/1/3/1/1/131163687/5611344.pdf
    • http://dadonkollection.com/uploads/1/3/0/5/130551434/bodaxuz.pdf
    • http://amalficapitalfunds.com/uploads/1/3/0/5/130539019/lulonede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vufukavedope.files.wordpress.com/2020/06/givifubowesuliwesajisa.pdf
    • https://vobusaragu.files.wordpress.com/2020/06/wujuduka.pdf
    • https://xuzorun.files.wordpress.com/2020/06/79542401059.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b84.bin
0cda968ee2fdfeeea5b68648d8211a46558c467fb2c6f263a19b2d00e37fcae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B84 9688 bytes

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