Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f5cd0c6bae4832d…

MALICIOUS

PDF

41.8 KB Created: 2020-04-10 15:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ed52ccf1365092c73374fc22da6f078b SHA-1: faf4d3787777ef9cc2dbb8ad8c7cd5c7190035c2 SHA-256: 9f5cd0c6bae4832d39e2018f8559646f5e282ae3b40b073c4e8435382adad61a
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious. The embedded document body text, though partially corrupted, contains references to 'Dragon ball z' and the wkhtmltopdf tool, suggesting a potential lure or obfuscation technique. The primary intent appears to be directing users to a network of malicious or spam-related PDF content.

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://lpbp.net/uploads/1/3/1/4/131406356/131406356.html#dragon+ball+z+tree+of+might+full+mov
    • http://agendart.ca/uploads/1/3/0/3/130379503/megulu.pdf
    • http://anglicanparishofwoodstock.ca/uploads/1/3/0/3/130313049/8096191.pdf
    • http://ladynuneztaxpro.com/uploads/1/3/0/4/130435680/e4119c2a0b.pdf
    • http://necroscape.com/uploads/1/3/0/5/130543010/vonikugaj.pdf
    • http://kirkparrish.com/uploads/1/3/0/4/130477252/mikafaxazovug.pdf
    • http://ammarketingsolutions.com/uploads/1/3/1/4/131438345/fd281.pdf
    • http://shawinsurancerealty.com/uploads/1/3/0/5/130551343/xuwame.pdf
    • http://kristinekingstondesigns.com/uploads/1/3/0/4/130489343/d17bb5dec3a.pdf
    • http://jkjlawnsprinkler.com/uploads/1/3/0/5/130551153/badabevizavamogoma.pdf
    • http://fda-int.org/uploads/1/3/1/3/131379045/jikifiruwiw.pdf
    • http://donbronzatti.com/uploads/1/3/1/0/131070437/5dd73a5d3629b3.pdf
    • http://121centre.com/uploads/1/3/0/6/130605193/87b81bfb660441.pdf
    • http://able2build.com/uploads/1/3/0/4/130483390/sadekofusugagon.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_off0000791e.bin
8c236ae3ae05dcab0b21163ba7616b4c57bd4046fd365bae9eac8b06091b8f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 8628 bytes

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