Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b834b3d561c210…

MALICIOUS

PDF

47.1 KB Created: 2020-03-29 10:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b607e3d8d38c31c84dfa526ef25de7b0 SHA-1: 43bf2742807b8d1cfe5dea482dd63c373fde240d SHA-256: 98b834b3d561c2107d929384a8085a01174e95e063086b86ac473afc3330f7a9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the extensive linking pattern indicates a likely intent to drive traffic to potentially compromised or malicious websites.

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://kreativekidsworld.com/uploads/1/3/0/4/130489567/130489567.html#cuidados+de+estomas+enfermeria
    • http://getazoeband.com/uploads/1/3/0/7/130775551/felifukibez.pdf
    • http://mail.bikiniusa.com/uploads/1/3/0/4/130483396/9211178.pdf
    • http://crowdergize.com/uploads/1/3/0/6/130639953/4cd696e9c7ba.pdf
    • http://rockandbach.com/uploads/1/3/0/5/130544009/5075624.pdf
    • http://integrianutrition.com/uploads/1/3/0/4/130435577/511414.pdf
    • http://thechelseapub.com/uploads/1/3/1/1/131163535/16da1c93f6aa4f.pdf
    • http://esbeesignsystems.com/uploads/1/3/0/2/130271041/6266651.pdf
    • http://coachtosuccess.co.uk/uploads/1/3/0/8/130814129/2475390.pdf
    • http://lisagumerman.com/uploads/1/3/1/0/131070646/xuramagunuwin-desotel.pdf
    • http://californiacustomwindows.com/uploads/1/3/1/3/131383734/lubawiwipop-rakigisigesez-jopekazuwo.pdf
    • http://mpaclarke.com/uploads/1/3/0/6/130604423/fupuzifiso.pdf
    • http://christineruth.com/uploads/1/3/0/5/130539270/6a3b7cf36fc01f.pdf
    • http://izipnotary.com/uploads/1/3/0/8/130813777/lexusuvijagus.pdf
    • http://allurebundlesandmore.com/uploads/1/3/0/5/130550911/ruwimirifibagusokopo.pdf
    • http://epicgrouptours.net/uploads/1/3/0/6/130620628/190443a7a.pdf
    • http://dczstrategy.de/uploads/1/3/0/6/130620321/f6ff79b4c.pdf
    • http://drummersanonymous.net/uploads/1/3/0/7/130739893/dafivagusowevuluxo.pdf
    • http://puertoricandj.com/uploads/1/3/0/8/130813834/lagenu-susesekejafol.pdf
    • http://www.thesanfranciscogeneralcontractor.com/uploads/1/3/0/2/130289495/lekuteda_ziwigapazus_zuxorifawip_nikamurevop.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007747.bin
c0bef8d66b9ebcaa61de7013e92c399b0ed7ff8ee0821f88d510432193cf74e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 8832 bytes
font_01_sfnt_off00009779.bin
1d1fa5121415f8f5353993473374918b9d2a38f433752094af4cce5d3be72c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9779 16312 bytes

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