Malicious PDF — malware analysis report

Static analysis result for SHA-256 745ee51afd180866…

MALICIOUS

PDF

39.7 KB Created: 2020-04-15 08:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 296f9c04d95cab845c2e73a8bb948617 SHA-1: a5caa9938488f8d3292e4deb548ddc45010d1f76 SHA-256: 745ee51afd180866f983a8d1fd6d60a5ec9ed12c83af45fd4b8f26319349c39b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various PDF files hosted on different domains, suggesting a tactic to manipulate search engine results or distribute malicious content. While no scripts were directly extracted, the nature of the embedded links and the PDF structure strongly indicate a malicious intent to redirect users to potentially harmful resources.

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://benevolentheartyoga.com/uploads/1/3/0/6/130620858/130620858.html#bhosari+midc+all+company+list+pdf
    • http://njgraniteconstruction.com/uploads/1/3/0/6/130639573/1576745.pdf
    • http://mollyjoseph2.com/uploads/1/3/0/7/130740053/69a36a85b.pdf
    • http://vogueciti.com/uploads/1/3/0/7/130776089/tiwukafefajipe.pdf
    • http://jackmoving.com/uploads/1/3/1/4/131453915/9687778.pdf
    • http://normandia-investments.com/uploads/1/3/1/4/131482894/1637773.pdf
    • http://ibmseduc.com/uploads/1/3/0/5/130539763/safazajikimubob.pdf
    • http://cogcomp.com/uploads/1/3/0/6/130640220/6be6c5f.pdf
    • http://superamazingreiki.com/uploads/1/3/1/6/131606396/gegaraputudu.pdf
    • http://exerciseandmealplans.net/uploads/1/3/0/2/130272609/9402215.pdf
    • http://franceshoulahan.com/uploads/1/3/0/2/130287847/pizef-foruz.pdf
    • http://wastewaterlogic.com/uploads/1/3/1/4/131454116/2627229.pdf
    • http://mobiledetailingplus.com/uploads/1/3/0/3/130313299/9124479.pdf
    • http://westonpestservices.com/uploads/1/3/0/6/130620644/wakezax.pdf
    • http://roes-legal.com/uploads/1/3/1/4/131437254/bezalebif.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_off000071ad.bin
7c07d15e7bc5ec6a8bef7cc9169fa71ed5e66d157d2a3d0937b371dce5b484a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AD 8480 bytes

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