Malicious PDF — malware analysis report

Static analysis result for SHA-256 8398496800197723…

MALICIOUS

PDF

48.5 KB Created: 2020-05-18 07:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56db9a9b45815eab1483e0dd69080843 SHA-1: 1a550f9965fddd1f47482acc30f19773f84f6e62 SHA-256: 83984968001977239cf67c958252411b4fe956898f5fa4a50efdc2253de6e958
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or a distribution mechanism for further content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to manipulate search engine results or redirect users to potentially malicious content.

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://orhsa.org/uploads/1/3/0/2/130272355/130272355.html#windsor+castle+history+pdf
    • http://atlanticpaint.com/uploads/1/3/0/7/130738591/6545320.pdf
    • http://missiononmain.com/uploads/1/3/0/2/130288722/xizunax_fijajupuzo_taduwowidav.pdf
    • http://kikilisgroup.com/uploads/1/3/0/5/130588937/389df0f.pdf
    • http://empowerufitness.org/uploads/1/3/0/8/130814252/zerojuzowewufuw.pdf
    • http://latterrayne.net/uploads/1/3/0/6/130604324/varovo_sojugapaligesaz.pdf
    • http://thehappybaker.net/uploads/1/3/1/3/131381882/resifexuzud.pdf
    • http://club2011.org/uploads/1/3/0/7/130775131/324361.pdf
    • http://timothyforsterarts.com/uploads/1/3/1/1/131164446/4894435aed.pdf
    • http://dexteramed.com/uploads/1/3/1/3/131382430/1c967b802980.pdf
    • http://smeacademy.se/uploads/1/3/0/8/130814286/kagasopejigogot.pdf
    • http://adamaslam.com/uploads/1/3/0/9/130969608/javibesobonen_revap_salutuf_fomomatogaxar.pdf
    • http://gonetva.com/uploads/1/3/1/3/131382607/6334295.pdf
    • http://amazonuk.org/uploads/1/3/0/3/130379824/zoraxu-kisomut.pdf
    • http://dianehenning-luce.com/uploads/1/3/0/7/130739128/nigupefa.pdf
    • http://pointbreaksjv.org/uploads/1/3/0/8/130813757/b987a3.pdf
    • http://goholisticatl.com/uploads/1/3/0/8/130874615/ravodadar_rudikuwefipam_livasoniga_zuvarivutopoli.pdf
    • http://sharingsheryl.com/uploads/1/3/0/6/130621964/90d65e.pdf
    • http://hairbyrochelleb.com/uploads/1/3/0/2/130291499/posemirudemowowaja.pdf
    • http://furnitureimportexportinc.com/uploads/1/3/0/5/130539182/8082954.pdf
    • http://rhfundingpa.com/uploads/1/3/0/6/130605278/mobadokeg.pdf
    • http://ps173q.com/uploads/1/3/0/2/130272327/2317796.pdf
    • http://rigchenma.com/uploads/1/3/1/6/131606128/videji-zemovamu-latatulimu-murus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093b0.bin
0e0ea4e35a8bfde376f7bbdfd5fd90c49d859a5452f3a0f74da51feec5855969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B0 10036 bytes

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