Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d57f58eed71afd…

MALICIOUS

PDF

35.0 KB Created: 2020-05-18 10:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ad60914a99201686195d1edf87fc77 SHA-1: 3ed55fe3615ffcd40dd8ae92b19b9f052587c1e2 SHA-256: e8d57f58eed71afdcbe22d6283fe7d8b8a773a7a6b4e6f39d0288127767cd539
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This pattern is indicative of SEO poisoning or a link farm designed to drive traffic to potentially malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nurturingbabies.net/uploads/1/3/0/6/130605075/130605075.html#ahrq+clearinghouse+practice+guidelines
    • http://madisonkjames.com/uploads/1/3/1/4/131406684/9451562.pdf
    • http://lawler312.com/uploads/1/3/1/4/131454859/woluro-resumivaje-rexuneboletug.pdf
    • http://simplyhello.com/uploads/1/3/0/5/130590561/e5daa323b8.pdf
    • http://thomasmayberry.com/uploads/1/3/0/5/130539696/tibix_wekuxevozi.pdf
    • http://mferconnections.net/uploads/1/3/0/5/130551418/fefodamip-vawadejele.pdf
    • http://thewheelman911.com/uploads/1/3/0/6/130639962/188cce308c.pdf
    • http://laplucas.com/uploads/1/3/0/6/130621656/rubixu.pdf
    • http://ffmconsultingllc.com/uploads/1/3/0/6/130604935/sasatijiga.pdf
    • http://mrsmishra.ca/uploads/1/3/1/3/131381428/xobebutesubimunune.pdf
    • http://withinthewildflowers.com/uploads/1/3/0/2/130289222/142e6b3a22e735.pdf
    • http://smokeandmirrorsbeauty.com/uploads/1/3/0/6/130620248/rinik_meberatif_gopijeb.pdf
    • http://coastalalllinesadjustingcompany.com/uploads/1/3/0/3/130323479/fikim-jupegu-vinad.pdf
    • http://northmyrtlebeachvrbo.com/uploads/1/3/0/4/130476940/5fd885c135f786.pdf
    • http://realestatenepa.com/uploads/1/3/0/2/130272638/butivufijafuw_rezevaverud_luxigo.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_off00005de4.bin
bde091d409568030a7a5999a06affb84c668fe5bdb9850ba2e24ad6509cb0e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE4 10336 bytes

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