Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd2dab45d003899…

MALICIOUS

PDF

46.3 KB Created: 2020-06-03 07:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8428e9590ac885f0caaae5bbac3903 SHA-1: 6f9b5980c35f062b7c61269228992d70cbbb6c00 SHA-256: afd2dab45d003899fcaf899dc502f419daa0106b365d3c869a442ec5f4272e62
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which are structured similarly and appear to be part of a link farm. The ML classifier strongly indicates maliciousness. The primary attack pattern involves directing users to these external sites, which likely host further malicious content or phishing pages. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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://thirdi.site/uploads/1/3/0/7/130739126/130739126.html#mi+acordeon+6+grado+2017+pdf
    • http://agoodhealthisjustthateasy.com/uploads/1/3/1/4/131409498/ef9c17cb0.pdf
    • http://dkmarley.com/uploads/1/3/0/6/130621292/130682d786d895a.pdf
    • http://manatonmakers.com/uploads/1/3/1/8/131871761/wujaga-bogukos-jajajaxos-nikomimuvuko.pdf
    • http://webmail.liacuu.org/uploads/1/3/0/7/130775593/doxad_tenin.pdf
    • http://fbcdillsboro.org/uploads/1/3/0/4/130476288/2878613.pdf
    • http://hostmaster.clemboo.co.uk/uploads/1/3/0/5/130588315/zizusufov.pdf
    • http://deittipt.com/uploads/1/3/0/3/130379411/4673e2c0c.pdf
    • http://totalweirdo.com/uploads/1/3/0/4/130483939/dimumedak.pdf
    • http://thirdi.site/uploads/1/3/0/7/130739126/terms.html
    • http://thirdi.site/uploads/1/3/0/7/130739126/dmca.html
    • http://thirdi.site/uploads/1/3/0/7/130739126/policy.html
    • https://pelagasov.files.wordpress.com/2020/06/29029626685.pdf
    • https://rujosodudox.files.wordpress.com/2020/05/walogebabuvajegijok.pdf
    • https://lavisegiz.files.wordpress.com/2020/05/79993230793.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_off00008585.bin
59769cab34af02e998bf70ec9755a4284bb94ccd4639314e328dafba1d95f282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8585 11956 bytes

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