Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e83b024ca4b135…

MALICIOUS

PDF

35.0 KB Created: 2020-04-10 08:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c215fddef410e25213df1e86b29436c3 SHA-1: c6ce856a386a4f3b981dd45eafdae5c0132c37df SHA-256: 99e83b024ca4b1352e8a988a89391daa092c85e702bdd9a632688acee6d9e5ea
92 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier and contains a large number of external links, characteristic of a link farm or SEO spam. The primary purpose appears to be directing users to other PDF files hosted on various domains. No scripts were extracted, and the document body is largely unreadable, making it difficult to determine the exact nature of the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bellasmarketandgiftstore.com/uploads/1/3/0/8/130874529/130874529.html#senos+paranasales+anatomia+y+funcion+pdf
    • http://goinggreengardening.com/uploads/1/3/0/5/130588988/3655f8.pdf
    • http://creammicofficial.com/uploads/1/3/1/4/131407588/timutenojuka.pdf
    • http://clearthebusinessfear.com/uploads/1/3/0/8/130874416/7f34afa944093.pdf
    • http://mary-johnson.com/uploads/1/3/0/6/130621296/79cc98230501.pdf
    • http://h2see.net/uploads/1/3/1/3/131380043/3230081.pdf
    • http://theonegoods.com/uploads/1/3/0/6/130604350/vefezodadoxi-tawovowaxewamaz-jagaterekag-fazimoluxuta.pdf
    • http://japtenterprisesllc.com/uploads/1/3/0/7/130775775/8303879d5b8cfa8.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_off00006037.bin
b228feb73091a328a2de139b653c4bd2c40c5e294a048a1f5559ea6989d56bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6037 8008 bytes

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