Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58ee4d2ab5d627a…

MALICIOUS

PDF

45.1 KB Created: 2020-04-03 02:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 083bf331054312b1db79f145cb0e4368 SHA-1: c677cade2ce15c7d6f7401d64d8623df9b8b2d89 SHA-256: c58ee4d2ab5d627ac80883d9b5ddda0d284f0cfb66adb4b4c22da2bb93dfc995
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://eccevideos.info/uploads/1/3/0/3/130323417/130323417.html#vanderbilt+adhd+parent
    • http://killickcarpentry.com/uploads/1/3/0/7/130776073/08f9e.pdf
    • http://aucklandpolo.com/uploads/1/3/0/2/130289346/e244630ae6bc.pdf
    • http://jwwicksattire.com/uploads/1/3/0/8/130814070/setomineloxakugudiva.pdf
    • http://angelajjonesart.com/uploads/1/3/0/4/130436289/9366871.pdf
    • http://loveoflifecoaching.org/uploads/1/3/1/3/131398091/e1834d9f5a5.pdf
    • http://ajllawncare.com/uploads/1/3/0/6/130639652/860298.pdf
    • http://www.mikeyhan.com/uploads/1/3/0/6/130604294/1216571.pdf
    • http://pjscoupons.com/uploads/1/3/0/4/130476203/83f6f55901b8b.pdf
    • http://themindtrainerhypnosis.com/uploads/1/3/0/2/130272267/fb03c14509a54a.pdf
    • http://jasonbeckner.com/uploads/1/3/0/4/130488542/dilorazikavasonesesa.pdf
    • http://hiver19by-marclannoo.com/uploads/1/3/0/8/130873732/wirapukago_nodekexibuzun_kusopuda.pdf
    • http://jeffhoweandco.com/uploads/1/3/0/3/130313069/444bf9deb4.pdf
    • http://eccevideos.info/uploads/1/3/0/6/130604500/sapuzogozowebuz.pdf
    • http://savethenubs.org/uploads/1/3/0/8/130813998/3d010e5cc.pdf
    • http://nrvprocessing.com/uploads/1/3/0/8/130874612/ruzolurenaxojo.pdf
    • http://boogietcontest.com/uploads/1/3/0/3/130323547/9429868.pdf
    • http://buytolet.guru/uploads/1/3/0/4/130435862/8182115.pdf
    • http://ministrycoachassociates.org/uploads/1/3/0/9/130968934/0173d2540dcdb02.pdf
    • http://cyfairironmaidenslacrosse.org/uploads/1/3/0/5/130550787/fb9ba.pdf
    • http://mail.chardontomorrow.org/uploads/1/3/1/4/131437780/e15cc2ffc0ae.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_off000086da.bin
6ed492a5b3fc28aae643729a59c6094b88ecfb9cc47150933106e3e113568117
pdf-font-stream PDF embedded font (sfnt) at offset 0x86DA 8416 bytes