Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3555623685ce855…

MALICIOUS

PDF

36.4 KB Created: 2020-06-04 17:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 757240b826df729131686fe12cad0e31 SHA-1: d59ba4e13238104f06c013717c2355bc78fa8301 SHA-256: a3555623685ce8556d40d475c83228e2d814560ed44351bed0c6ab242d769423
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, also contains URLs. This suggests the primary purpose is to redirect users to a network of websites, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

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://csideas4ed.com/uploads/1/3/0/6/130621450/130621450.html#81+year+old+american+ninja+warrior
    • http://crochetbraidsdetroit.com/uploads/1/3/0/7/130775658/6901723.pdf
    • http://welcometogoldstar.com/uploads/1/3/0/3/130324288/noginipawu.pdf
    • http://gcspatriots.org/uploads/1/3/1/3/131382373/2cca8ca78760a5c.pdf
    • http://nccctest.com/uploads/1/3/0/5/130588503/c0f11ac2.pdf
    • http://rmdrainageandplumbingltd.com/uploads/1/3/1/3/131384214/f7a7f253.pdf
    • http://webmail.oohprettylashco.com/uploads/1/3/1/3/131398285/66d55e25.pdf
    • http://wertek.org/uploads/1/3/0/5/130550833/xilibizasonatewafu.pdf
    • http://comraichtherapy.co.uk/uploads/1/3/0/4/130490117/xibutowowo_zizesorupiliz_dezugu_tisaxulan.pdf
    • http://1mn.undesirable.us/uploads/1/3/0/3/130313122/096497bd2da5a9b.pdf
    • http://poolleaks.monster/uploads/1/3/0/2/130274338/piporesivoku_xetopajapusa_fedabugidos.pdf
    • http://3wx.undesirable.us/uploads/1/3/0/5/130540683/b7689e68881ce0d.pdf
    • http://csideas4ed.com/uploads/1/3/0/6/130621450/terms.html
    • http://csideas4ed.com/uploads/1/3/0/6/130621450/dmca.html
    • http://csideas4ed.com/uploads/1/3/0/6/130621450/policy.html
    • http://csideas4ed.com/uploads/1/3/0/6/1306
    • https://zexitisi.files.wordpress.com/2020/06/74709863417.pdf
    • https://fufumifuka725055015.files.wordpress.com/2020/06/nuxegurawerugef.pdf
    • https://setiruru.files.wordpress.com/2020/06/bojorivudoxuxuxapusaxa.pdf
    • https://doluwamesiwe.files.wordpress.com/2020/06/tanorewedume.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_off000062c4.bin
670a16780ae37078c59706ba9e2fdfe1cc4b2ae5210925268753233592beb1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 10152 bytes

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