Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7520614b372f0c8…

MALICIOUS

PDF

33.6 KB Created: 2020-04-11 06:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 82ff8ae902a61cfb0d4de12937d4a54b SHA-1: 91b7d8ad59b1acecb8da1fdb02c0e1141f767024 SHA-256: b7520614b372f0c8c218024235e6b69b9ae9280476b20eeefd99c4310c9772ac
62 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO poisoning or link farm attacks to drive traffic to malicious sites. The document body, though partially corrupted, suggests a lure related to educational materials. The presence of multiple PDF links on domains like azurewomensapparel.com and chewoncakes.com indicates a coordinated effort to host potentially malicious content or redirect users to phishing pages.

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://chewoncakes.com/uploads/1/3/0/7/130776611/130776611.html#earth+science+tarbuck+15th+edition+p
    • http://azurewomensapparel.com/uploads/1/3/1/4/131453109/vuzagodajoxide.pdf
    • http://cristovaosuzuki.com/uploads/1/3/1/3/131383790/dozilavizugolibuxan.pdf
    • http://clearflowvalves.com/uploads/1/3/1/4/131455069/nitevar.pdf
    • http://shannonsresaleonline.com/uploads/1/3/0/6/130639076/jodapusasidaxaju.pdf
    • http://compassportals.com/uploads/1/3/1/4/131454683/wenewifagapaganozex.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_off00005ae4.bin
4d3311bd127ba86d36e2ca9ec2daef2100f71d4a27a89a800d71a7840b753038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE4 7776 bytes

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