Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5bb45b02df42de7…

MALICIOUS

PDF

44.8 KB Created: 2020-04-14 04:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a733e31e856f2c24666efedf9abe3ce4 SHA-1: 169553987a46b52265562237beddf32e3454ec34 SHA-256: a5bb45b02df42de70922261a46ec5af6911c41bfd8429a10691fee3aaad9798e
92 Risk Score

Malware Insights

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

The PDF contains a deceptive lure referencing an 'Android virus scan app' to encourage users to click on a link. This link redirects to a malicious website, as indicated by the PDF_URI and PDF_SEO_LINK_FARM heuristics. The ML_NYX_PDF_MALICIOUS classifier also strongly supports the malicious nature of this document. The primary attack pattern involves social engineering to drive traffic to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://courtneythevirtualassistant.com/uploads/1/3/1/4/131453248/131453248.html#android+virus+scan+app
    • http://tribeofhealth.com/uploads/1/3/0/6/130620594/sevanegexewedido.pdf
    • http://piedravivaiglesia.org/uploads/1/3/0/2/130270792/godedefeliwu-zuzojunur-tilon.pdf
    • http://ultrasoundtutoring.com/uploads/1/3/0/4/130483603/2e6f05b7d8e1.pdf
    • http://shopextinct.com/uploads/1/3/1/0/131070125/sifiboname-pafuvig-voxen.pdf
    • http://hairideology.net/uploads/1/3/0/7/130739567/f377022d8718f.pdf
    • http://vintagestylechaos.com/uploads/1/3/0/6/130604191/3224665.pdf
    • http://peacepoplar.org/uploads/1/3/1/3/131382790/jabazokaxuzut_feteban.pdf
    • http://metrofelxgymphoenix.com/uploads/1/3/1/4/131437293/taroluxugifoja.pdf
    • http://mysamcooke.com/uploads/1/3/1/3/131398231/xebuko_dexoduxefo_lefetu.pdf
    • http://atoz-builders.com/uploads/1/3/0/2/130274315/gukupepon.pdf
    • http://freetakes.com/uploads/1/3/1/6/131637430/1981305.pdf
    • http://americanbasicschildcare.com/uploads/1/3/0/5/130588816/fcb578ad4b1.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_off00008769.bin
d277d217eb507fa787644b6b33fe4c865791a014e0a2ff17b8e27800ef643ed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 8280 bytes

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