Malicious PDF — malware analysis report

Static analysis result for SHA-256 fddd180cd8e2cc8c…

MALICIOUS

PDF

41.7 KB Created: 2020-03-12 05:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ca993653da7731c61807a71ca5049fe1 SHA-1: 47f69ecba1c72d9c9142909dac739b36829929fc SHA-256: fddd180cd8e2cc8c6e46a80a5dd7e1e6aacf4feabbcea5a7bcbe86620d211598
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique commonly used for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, pointing to numerous PDF files hosted on various domains. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of outbound links suggests a delivery mechanism for further compromise.

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://thismaycomeinhandy.com/uploads/1/3/0/4/130477028/130477028.html#best+food+chain+franchise+in+the+philippines
    • http://mlanier.frs.com/uploads/1/3/0/5/130545429/5ece60c.pdf
    • http://yourhomesitter.com/uploads/1/3/0/6/130604202/9376805.pdf
    • http://xn-ig8h.com/uploads/1/3/0/5/130545742/jonoxosujot_xanoporo.pdf
    • http://www.annamae22pngstock.com/uploads/1/3/0/7/130775612/sajowiselurisuvujun.pdf
    • http://anansiworks.com/uploads/1/3/0/2/130289519/2047500.pdf
    • http://www.getpoa.org/uploads/1/3/0/9/130969577/pojavilime_xiwibo_bawiwemezozosiz_lesisipakuro.pdf
    • http://www.cocovanille.com.au/uploads/1/3/0/7/130740607/mader.pdf
    • http://mta-sts.mx.longbridgeconstruction.com/uploads/1/3/0/6/130603983/9816402.pdf
    • http://michelevevang.com/uploads/1/3/0/3/130313403/kunaxazowopanav-rigos-gotupar.pdf
    • http://www.ashiver.com/uploads/1/3/1/1/131164352/mapisojawizabopoti.pdf
    • http://www.trailandhunt.com/uploads/1/3/0/5/130551222/sapefanowu.pdf
    • http://best-office-bueroservice.de/uploads/1/3/0/7/130739182/2003695.pdf
    • http://www.alexsovoda.com/uploads/1/3/0/8/130874110/bagokoz-zabunala-konalefudala.pdf
    • http://changeofheartmentoring.com/uploads/1/3/0/7/130775679/9dd96531fc8.pdf
    • http://74-123-73-214.mgwnet.com/uploads/1/3/0/6/130621019/e2c4698f277.pdf
    • http://curvesontrend.com/uploads/1/3/0/5/130588607/surikama_lavema_vakafok_lixewotuvobiz.pdf
    • http://imranyusuff.net/uploads/1/3/0/3/130312952/fetitikonowa.pdf
    • http://allnewit.com/uploads/1/3/0/7/130775495/7247307.pdf
    • http://downingpropertiesmi.com/uploads/1/3/0/2/130272856/dbbf7eb9b40264.pdf
    • http://alphabetty.org/uploads/1/3/0/5/130588237/wepomapuzubidu.pdf
    • http://myperfectfocus.com/uploads/1/3/0/6/130620958/1aaf504da2e.pdf
    • http://www.unitedcommunitycenter.org/uploads/1/3/0/7/130739000/fea8bfe02d8648.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_off0000770f.bin
678b8187f4ae08ca74003f3ed1d88d7138b9efafd25398540ec350ded65f4014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770F 8976 bytes

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