Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7bb709eb8f2b9f…

MALICIOUS

PDF

39.9 KB Created: 2020-03-21 18:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 83c4a0162f61ea9483423d1569a35743 SHA-1: f63a05d2baa026e2f694a4d89094d32baa7b0a20 SHA-256: 8a7bb709eb8f2b9f173545d2f2394773d1ecacdca85362c6582d3a97ca3df052
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, disguised as content related to Kung Fu techniques. The heuristic 'PDF_SEO_LINK_FARM' indicates that this is a link farm, likely intended to drive traffic to various other PDF files hosted on different domains. The document body itself is heavily obfuscated but contains references to the URLs. 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://roadshowarchitects.com/uploads/1/3/1/0/131069789/131069789.html#kung+fu+techniques+for+beginners+pdf
    • http://www.elndp.com/uploads/1/3/0/2/130272636/2684988.pdf
    • http://www.fatsumtrading.com/uploads/1/3/0/4/130477829/sikojuka-sepaj.pdf
    • http://amredco.com/uploads/1/3/0/8/130813988/4e5e78503c.pdf
    • http://mischawelsh.org/uploads/1/3/0/7/130775928/1752581.pdf
    • http://msdaniels.com/uploads/1/3/0/2/130291769/pekimex.pdf
    • http://stmargaretbiglake.com/uploads/1/3/0/6/130639939/d869dba028a1e1.pdf
    • http://tvparty2020.com/uploads/1/3/0/7/130739653/398496.pdf
    • http://buecenas.com/uploads/1/3/1/1/131163505/a7536ab94541.pdf
    • http://www.unlimiteddogtraining.com/uploads/1/3/0/7/130739492/xupoka-pirazuwade-kepuriwupa-fuwujewuz.pdf
    • http://www.sephotography.studio/uploads/1/3/0/6/130639038/b9bc9dd98ffaf.pdf
    • http://www.makevotingmatter.net/uploads/1/3/0/4/130436431/xilawawavifudu.pdf
    • http://virtue.coffee/uploads/1/3/0/5/130588256/2018228.pdf
    • http://jdrconsultancy.net/uploads/1/3/0/7/130740496/puvezefaviwok.pdf
    • http://aukstamford.com/uploads/1/3/0/6/130639305/8f0d5791db0.pdf
    • http://surreypersonalbest.com/uploads/1/3/0/5/130540559/f4bfa.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_off00007456.bin
189a22332d79fe40ab7f89f796264611ec7a950e12f1337c66ce4129eb24fa37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7456 7720 bytes

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